Big dogs often come with even bigger hearts. While their size may turn heads and their bark may command attention, loyal giant dog breeds are known just as much for their devotion and sensitivity as for their impressive stature. These massive pups aren’t just protectors—they’re companions, cuddle buddies, and often the most emotionally intuitive members of the household.
Giant breeds have long been treasured for their work ethic and protective nature. But behind that guarding instinct is usually a deeply affectionate soul. From mountain rescue missions to livestock protection to cozying up on the couch, these dogs are defined by their loyalty and bond with humans.
Whether you’re seeking a gentle playmate for kids, a steadfast guardian, or a best friend who doubles as a living teddy bear, this list of loyal giant breeds is sure to melt your heart and maybe take up your whole couch.
Loyal Giant Dog Breeds
1. Boerboel
The Boerboel, a powerful guardian from South Africa, was originally bred to protect homesteads from large predators like lions. But beyond their intimidating appearance lies a deeply affectionate and devoted dog. Known for forming strong bonds with their families, Boerboels are among the most loyal of giant breeds.
These muscular protectors are calm and confident yet highly aware of their surroundings. They are fiercely protective without being aggressive, making them excellent for families in need of both a watchdog and a companion. While they can be wary of strangers, Boerboels are gentle giants when it comes to their loved ones.
These dogs thrive on human companionship and do best in homes where they’re included in daily life. They aren’t the kind of dog that enjoys being left alone for long stretches—they want to be part of the pack. Their loyalty is earned through time, care, and consistency.
Because of their intelligence, Orvis says Boerboels respond well to training when approached with firm, positive reinforcement. Their alertness and strength will mean they need confident leadership, but once boundaries are set, they are among the most dependable breeds you could ask for.
Despite their size, these devoted family companions are surprisingly agile and can be playful and affectionate with family members, especially kids. With proper socialization from a young age, they grow into gentle, nurturing protectors who are intuitive and tuned in to their humans’ emotions.
If you’re looking for a fiercely loyal, intelligent, and family-oriented guardian, the Boerboel is a loving powerhouse that offers both security and companionship in equal measure.
2. Saint Bernard
Famous for their mountain rescue heritage in the Swiss Alps, Saint Bernards are the embodiment of gentle giants. These dogs are not only massive in size but also enormous in heart. With their expressive eyes and easygoing nature, it’s easy to see why they’re such beloved companions.
Saint Bernards are naturally nurturing and deeply bonded to their people. Their loyalty shines through in their protective instincts and calm demeanor. They tend to be especially gentle with children, often serving as furry babysitters thanks to their patience and attentiveness.
While their size might seem overwhelming, Saint Bernards are known for their laid-back nature. They don’t require intense exercise and are more than happy to relax indoors with their families. They crave your presence most—they thrive on closeness and affection.
WebMD claims these dogs tend to be incredibly empathetic and have a sweet temperament. It’s not unusual for a Saint Bernard to sense when their human is sad or stressed and respond with comforting nuzzles or quiet companionship. Their ability to connect emotionally is one of their most endearing traits.
Because of their working background, Saint Bernards benefit from basic training and routine, but they’re not overly stubborn or difficult to manage. Their cooperative spirit makes them a joy to raise and a wonderful match for families, including first-time dog owners.
In short, Saint Bernards are loyal to the core—protective without being aggressive, nurturing without being needy. If you’re seeking a fantastic family pet that offers devotion with a dash of drool, this breed may be your perfect gentle giant.
3. Neapolitan Mastiff
The Neapolitan Mastiff is a breed that makes an unforgettable first impression. With their massive frame, loose skin, and deep facial wrinkles, they look like ancient statues come to life. But underneath their formidable appearance lies a dog that is deeply loyal and affectionate with those they trust.
These dogs were historically used as guard dogs in southern Italy, and their protective instincts remain strong today. They are incredibly territorial and will not hesitate to put themselves between their family and any perceived threat. However, they are not prone to unnecessary aggression—this breed is deliberate, calm, and watchful.
While their guarding instincts are top-tier, it’s their unwavering bond with their people that sets them apart. Neapolitan Mastiffs form tight-knit connections and are often happiest when lounging close to their humans. They thrive in households where they’re included and not isolated.
Due to their size and strong will, early socialization, and firm, positive training are essential. They’re intelligent but can be stubborn if not handled with confident leadership. Consistency is key in shaping a well-mannered Neapolitan Mastiff.
Their short coat is low-maintenance, but drool is another story—this breed is a prolific slobberer. If you can handle a little mess in exchange for massive love and loyalty, this breed is worth every paper towel.
Suppose you’re looking for a stoic, brave, and affectionate protector who bonds deeply with family. In that case, the Neapolitan Mastiff is as loyal as they come—just be ready for their big heart (and even bigger presence) to take over your home.
4. Scottish Deerhound
The Scottish Deerhound is a regal and gentle breed with an ancient lineage tracing back to Scottish nobility. Bred to hunt red deer in the rugged Highlands, these dogs are tall, wiry, and full of quiet grace. While their hunting days may be behind them, their loyalty and tenderness endure.
Known as the “Royal Dog of Scotland,” this breed was used as hunting dogs to hunt red deer by chasing them down with speed and stamina.
Despite their size and hunting heritage, these family pets are among the most laid-back giant breeds. They’re dignified and serene, preferring peaceful companionship over rough play. Don’t let their calm fool you—they form deep, lasting bonds with their families and are unwavering in their affection.
They are intuitive dogs, often picking up on the emotions of their owners and offering quiet support during stressful times. Their affectionate yet undemanding presence makes them ideal for calm households or anyone looking for a gentle soul in a big body.
PetMD claims though they enjoy lounging, Scottish Deerhounds do need daily walks or room to stretch their long legs. They’re built for bursts of speed, not endurance, and they appreciate opportunities to run in safe, enclosed areas.
Training a Deerhound is usually straightforward, thanks to their cooperative nature. They’re not especially stubborn, but they do best with gentle, consistent guidance rather than harsh correction.
Elegant, loyal, and sweet-natured, the Scottish Deerhound is a true aristocrat among dogs—perfect for anyone seeking a quiet yet affectionate giant companion.
5. Newfoundland
Nicknamed the “gentle giant of the dog world,” the Newfoundland is famous for its sweet nature, strength, and water-rescue abilities. Originally bred in Canada to help fishermen, this breed has a long history of loyalty and service.
Newfoundlands are one of the most affectionate giant breeds you can find. They’re especially known for their devotion to children, often called “nanny dogs” for their gentle, watchful care. These calm and friendly nature dogs are ideal family companions.
These dogs have webbed feet and are natural swimmers. They’re still used as rescue dogs in water rescue drills in some countries like Italy and are capable of pulling drowning people to safety.
These dogs are built for tough weather and hard work, but they prefer spending time close to their humans. Whether it’s cuddling on the couch or patrolling the yard, they’re happiest when they’re by your side. Their loyalty is unwavering.
Training is typically a breeze with Newfies. They respond well to positive reinforcement and enjoy pleasing their owners. Their laid-back nature means they’re less prone to stubbornness than some other large breeds.
Their thick, water-resistant coats require regular grooming to prevent matting, especially around the neck and tail. They also drool a bit, but their loving nature makes the cleanup worthwhile.
If you’re seeking a large, loyal, and one of the most loyal dog breeds that doubles as a gentle guardian, the Newfoundland may be your dream dog.
6. Leonberger
The Leonberger is a majestic giant dog breed that combines strength with sweetness. Bred in Germany to resemble a lion, the Leonberger has a beautiful mane-like coat and a warm, expressive face that perfectly matches its loyal personality.
Leonbergers, recognized by the American Kennel Club, are incredibly affectionate and form deep bonds with their families, just like the German Shepherds. They thrive on companionship and often act as furry shadows, following their humans from room to room. Their loyalty is fierce but gentle—they’re protective without being aggressive.
Despite its size, this loyal dog breed is known for its grace and calm demeanor.
They do best in homes where they have plenty of space to stretch out and enjoy family life. They’re great with children and other pets, often acting as peacekeepers within the household.
Training a Leonberger is usually enjoyable thanks to their eagerness to please. They’re intelligent and sensitive, responding well to positive reinforcement and patient instruction.
Their long, thick coat requires regular brushing to prevent tangles and maintain its beauty. They’re not heavy droolers, but they do shed heavily, especially during seasonal changes.
For a loyal, majestic, and incredibly loyal giant dog that will always be by your side, the Leonberger is a truly noble choice.
7. Pyrenean Mastiff
The Pyrenean Mastiff is a lesser-known gem among giant dog breeds, originally developed in Spain to protect livestock from predators like wolves and bears. With a calm temperament and an intensely loyal streak, this breed is both a guardian and a gentle friend.
These dogs are deeply bonded to their families and instinctively protective. They’re naturally wary of strangers but never aggressive without cause. Their presence alone is often enough to deter intruders, and they prefer to watch quietly rather than bark excessively.
Pyrenean Mastiffs are incredibly patient and nurturing, especially with children. They’re known for their stable temperament and ability to stay calm in stressful situations—ideal qualities in any loyal companion.
While they do need room to roam, they’re not overly energetic. Moderate daily exercise and mental stimulation keep them healthy and happy. They’re well-suited for rural homes or large properties.
Their thick, double coats require consistent grooming, particularly during shedding seasons. Brushing a few times a week helps keep their coat healthy and reduces tangling.
If you want a devoted, serene, and noble giant who watches over your home with quiet strength, the Pyrenean Mastiff is an excellent choice.
8. Irish Wolfhound
With roots stretching back to ancient Ireland, the Irish Wolfhound is a legendary breed known for its immense size and heart. Once used to hunt wolves, these towering dogs are now beloved for their calm, loyal nature.
Despite their imposing height, Irish Wolfhounds are gentle and sweet-tempered. They form strong emotional connections with their humans and are happiest when included in the rhythms of family life. Their loyalty is unwavering and heartfelt.
These dogs thrive on affection and are typically quiet and reserved indoors. They’re excellent with children and other pets, and their calm demeanor makes them adaptable to various home environments—provided there’s enough space for their long limbs.
Exercise is important, but they don’t require intense activity. A couple of long walks and some free-running time in a safe area is usually enough. They enjoy lounging and cuddling just as much as they enjoy galloping in open fields.
Their wiry coat is relatively low-maintenance, needing only regular brushing. More than grooming, they require your companionship and a gentle hand in training.
For those seeking a giant dog with a peaceful soul and a loyal heart, the Irish Wolfhound is an ancient treasure that brings warmth and nobility to any home.
9. English Mastiff
The English Mastiff is a breed of awe-inspiring size and soft-hearted loyalty. Known as one of the largest dog breeds in the world, these gentle giants are renowned for their calm demeanor, devotion, and unmistakable presence.
They were once war dogs, but today, they’re peaceful protectors. Their size alone is often enough to deter intruders, yet they rarely act out unless necessary. Instead, they watch over their families with silent strength.
As per VCA Animals, these dogs are deeply affectionate with their humans and particularly good with children. Mastiffs often form close bonds with everyone in the household and are known to follow their people from room to room like giant shadows.
While they can be stubborn, they are also incredibly sensitive. Harsh training methods don’t work well—these dogs respond best to gentle, positive reinforcement and plenty of praise.
Their short coat is easy to groom, but be prepared for drool—especially after meals or drinks. However, A little slobber is a small price for such a loyal and loving companion.
If you’re looking for a steadfast, serene, and affectionate dog that doubles as a loyal guardian, the English Mastiff is a magnificent companion in a massive package.
Conclusion
Loyal giant dog breeds are more than oversized cuddle buddies—they’re steadfast protectors, emotional supporters, and lifelong friends. Whether you’re drawn to the gentle spirit of Saint Bernard, the ancient dignity of the Irish Wolfhound, or the bold loyalty of the Boerboel, a massive-hearted dog is waiting to stand by your side.
Bernese mountain dogs, Labrador retrievers, Great Pyrenees, Great Danes, Golden retrievers, Cocker spaniels, Irish setters, and Doberman pinschers are some other dogs with an instinct for protection.
These breeds remind us that loyalty isn’t measured in size—but when it comes with a wagging tail and 150+ pounds of love, it sure leaves an impression. With the right training, care, and companionship, these gentle giants will repay your love tenfold—for life.
