I'll vouch for Chow Chow's and Lab's. But only Chow's if it ONLY going to be you, they only take to a max of about 3 people. But otherwise very sweet and protective dogs
Remember, that lab's have different temperments w/the different colors also! So Yellow in my book is the best way to go
I had a yellow by the name of "woody" and he was the best dog ever
Just give him a decent yard to run in and don't trust them w/a lot of food! They eat everything!