Big dogs have a certain magic to them. They don’t just walk into a room—they arrive. Floors creak. Tails sweep coffee tables clean. And when they decide you’re their person? That loyalty is the kind that makes you feel like the main character in a heroic epic… except the hero drools a little and thinks your socks are a snack.
Everyone is familiar with Great Danes and Saint Bernards. But there’s a whole world of giant breeds that don’t get nearly enough spotlight—despite being intensely devoted, fascinatingly historic, and (let’s be honest) wildly impressive at taking up an entire couch.
Below are 7 lesser-talked-about oversized dog breeds with reputations for steadfast companionship and calm temperaments. We’re talking dogs who will follow you to the ends of the earth—or at least to the kitchen, every single time you move.
Little-Known Giant Dog Breeds With Unmatched Loyalty
1. Neapolitan Mastiff
If you’ve ever looked at a dog and thought, “This animal could guard a castle and star in a fantasy movie,” you were probably looking at a Neapolitan Mastiff.
Neos are famously devoted to their people. They’re not usually the “make friends with everyone at the dog park” type. AKC claims these family dogs tend to bond deeply with their family and take their job as home guardian seriously—often with a calm, watchful vibe that says, I’m not worried. I’m just… monitoring.
Many historians believe mastiff-type dogs like this were used in ancient Rome as war dogs and guardians. Whether every legend is 100% accurate or not, the Neo absolutely looks like it has seen empires rise and fall.
Wrinkles with a purpose: Those signature folds may have helped protect them in confrontations by making it harder for an opponent to get a firm grip. These big-breed dogs are gentle at home but can be protective, so early training and socialization matter.
Expect drool. Not “a little drool.” More like: keep towels in multiple rooms like you’re managing a tiny car wash.
2. Scottish Deerhound
Elegant, tall, and built like a noble athlete, the Scottish Deerhound looks like it stepped out of a medieval painting—then politely asked where the softest blanket is.
Deerhounds are often called gentle souls with a calm demeanor. They bond strongly with their humans and typically have a sweet, affectionate nature. Their loyalty isn’t usually “guard dog intense”—it’s more “I will quietly love you forever and lean on you like a living coat rack.”
Aristocracy’s favorite: They were used to hunt red deer in Scotland and were historically associated with nobility.
They’re sighthounds—meaning they chase with their eyes—so when something runs, their brain goes, ah yes, a sprint opportunity. Also, they showcase a gentle nature indoors—almost cat-like in calmness. They need room to stretch those legs—think secure yard or regular chances to run safely.
Indoors? Surprisingly chill. Outdoors? Occasionally, a wind-powered missile.
3. Tibetan Mastiff
The Tibetan Mastiff is the kind of dog that makes people stop mid-sentence. Big frame. Lion-like mane. Serious expression. It’s as if a bear and a philosopher collaborated on a pet.
Tibetan Mastiffs can be intensely devoted and protective of their home and family. They tend to be independent thinkers (translation: they don’t live to impress you), but when they choose you, the bond is deep.
Chewy says they were historically used to guard livestock, villages, and monasteries in the Himalayas. These dogs don’t give their loyalty away easily—but once it chooses you, that bond is strong and enduring. They’re devoted to their family and territory, often staying close without demanding constant attention.
Many are more alert at night—an old working trait from guarding in remote areas.
They’re not typically eager to please. Training requires patience and respect. These family pets can be reserved with strangers—excellent for guardianship, but socialization is non-negotiable.
4. Leonberger
If a golden sunset could become a dog, it would be a Leonberger. Massive, fluffy, warm-hearted, and often described as a “gentle giant” with a goofy streak.
Leonbergers thrive on being with their family. They’re known for being affectionate, stable, and people-oriented—often happiest when they’re included in everything (yes, including the thing where you go to the bathroom alone).
A dog fit for a symbol: The breed was developed in the 1800s in Germany, allegedly to resemble the lion on the town crest of Leonberg.
Many Leonbergers love swimming and have webbed feet—built for splashing like a pro, claims Purina.
Despite being a large breed, these dogs are surprisingly gentle with children when well trained and supervised.
That coat needs regular grooming—unless you enjoy living in a snow globe of fur.
5. Black Russian Terrier
Despite the name, the Black Russian Terrier is not a true terrier in the classic “small and spicy” sense. It’s more like: a tank with eyebrows—and a heart that’s all-in for its people.
BRTs are known for being devoted, confident, and protective. They typically bond strongly with their family and take guarding instincts seriously, often preferring to stay near their humans.
A purposeful creation: Developed in the Soviet Union in the mid-1900s for military and working roles—bred for resilience, intelligence, and strength.
Weather-ready: That dense coat wasn’t just for looks; it helped them handle harsh climates.
They’re smart, which is wonderful… and also means they’ll invent their own hobbies if bored (some of which you may not approve of).
Best with owners who enjoy training and can provide structure.
6. Dogue de Bordeaux (French Mastiff)
With its giant head, soulful eyes, and “I am both majestic and slightly dramatic” energy, the Dogue de Bordeaux is unforgettable.
This breed tends to be intensely attached to its family. Dogues often want to be close—like, close close. They can be affectionate, calm, and brave, and many owners describe their bond as deeply personal and protective.
Old French roots: The Dogue has a long history in France, used historically for guarding, hauling, and protection, according to PetMD
Pop culture moment: The breed got a boost in recognition from the film Turner & Hooch—though real-life Dogues are usually more dignified than the movie chaos.
If you are an animal lover, you know that animals can be wonderful companions; however, early socialization is important given their strength and protective instincts.
Also: drool. This is a theme. Giant loyalty often comes with giant slobber.
7. Estrela Mountain Dog
The Estrela Mountain Dog is a Portuguese livestock guardian with a steady, devoted heart. Think: rugged, watchful, and quietly affectionate once you’re “their people.”
They are known for strong family bonds and protective instincts. They’re often calm with their own household but naturally cautious with strangers—like a bouncer who loves you and distrusts your sketchy ex.
Ancient guardian: This is one of the oldest breeds from Portugal’s Serra da Estrela region, historically used to guard flocks against predators.
Two coat types: They come in long and short coats—same loyal personality, different levels of “fur on everything.”
They do best with consistent leadership and socialization. Estrelas think for themselves. They are not eager to please, unlike Labs or Goldens. Training requires patience, consistency, and respect—not force. They don’t instantly trust visitors. Proper socialization is critical, especially if your family has frequent guests or kids’ friends coming over.
Because they’re guardians, they may patrol the yard and “announce” things—yes, that includes suspicious leaves.
Conclusion
These large dog breeds may not be the most common names you hear at the vet’s office, but they share something powerful: deep, steadfast loyalty. Some protect with quiet vigilance. Some adore with soft-eyed tenderness. Others do both—then attempt to sit in your lap like they weigh 12 pounds.
If you’re thinking about adding one of these giants to your life, remember:
Giant breeds need space, training, and socialization
Their health can benefit from joint care, appropriate exercise, and vet guidance
And yes, your furniture will never be the same—but your life might be bigger in the best way
