|more irish wolfhound HERE|
More mastiffs HERE
One online site lists these: Akita Alaskan Malamute Anatolian Shepherd Dog Burmese Mountain Dog Black Russian Terrier Boxer Bullmastiff Canis Panther Doberman Pinscher Dogue de Bordeaux German Pinscher Giant Schnauzer Great Dane Great Pyrenees Greater Swiss Mountain Dog Komondor Kuvasz Mastiff Neapolitan Mastiff Newfoundland Portuguese Water Dog Rottweiler Saint Bernard Samoyed Siberian Husky Standard Schnauzer Tibetan Mastiff
and says,"Dog Breeds of the Working Group were originally bred to assist their human-counterparts in performing labor-intensive tasks. They generally own a large, physically robust stature, with strong points including a high level of intelligence that has historically allowed them to specialize in guarding, sled-pulling, or helping to transport materials or other goods. This typically includes search-and-rescue dogs. This Group contains 25 Dog Breeds in total."