I would recommend the Belgian Malinois: Very smart, obedient and has a strong protective instinct. Also the dog is short haired so is easy to groom and to my knowledge there is no "drooling" problem. If well socialized, the Belgian Malinois should be good with people and other dogs. It is a pretty healthy breed if you find a good breeder.

However this dog needs plenty of exercise and training. Also, some of these dogs tend to be very nervous.