✔ 最佳答案
first off i would like to say that you should look in your local shelter, im sure there are tones of dogs there that fit your criteria and are looking for someone to save them.
i think you might be interested in:
doberman pincer: loving, gentle, loyal but very capable of restraining an intruder
great dane: big lovable, sweet, loyal, trustworthy, they were used as guard dogs so they are still capable of restraining an intruder.
rottweiler: about the same as the doberman
pitbull: these dogs have a bad rap but thats only because of thir owners: they are similar to the rottie and dobe
i love all these breeds so good luck
rememmber there is probubly lots of dogs in your local shelter just waiting for someonelike you to save them. do lots of research before getting a certain breed.
hope this answer helps :)