So many to choose from!
 
Shih Tzus are very sweet dogs. 
Pugs if you like the weird breathing sounds.
Bostons are very cool.
Westie? But I wouldn't say they are the most cooperative.
Cavaliers are about the nicest dogs out there.
PBGV 

 - I only mention this breed bc we believe our pup is at least part and he is very good with the yorkie that has Queen Syndrome.

 Not a breed for most though.
Frenchie?
Norfolk?