Uh no. Aggressive roosters are simply aggressive. They don't improve with a small flock, especially with "young, dumb ones" who are not experienced enough to keep him in check.
A year of age is still young for a rooster. My mature hens severely haze my silly teens, but I have trouble with the...
I appreciate your desire to give him a chance, however, you may want to reconsider this choice. If he was truly aggressive to small children and other roosters, why do you want to breed that forward? Genetics play a large part in temperament of chickens, especially roosters.
Personally, I...