Tibetan Mastiff - OMG! I want this massive, cuddly, teddy bear doggie! ♥ For some reason, I like dogs that are either very tiny, or totally huge. Not so much on average or in-between.
Giant Newfoundland Dog - Bing images
Lily a 6 year old great dane lost his eyesight due to a rare disease. He became... disheartened until he met Madison. They have been together for 5 years and Madison guides Lily by the leash and touches him to make sure he doesnt stumble over anything.
This is the immense Tibetan Lion Dog. They are huge powerful dogs and could eat pitbulls for breakfast on its cereal. I understand they are fiercely loyal also. To buy one would set you back over $10,000 IF you could find someone willing to let you buy one.