I don't have aggressive roosters ever. I keep a few different breeds, both standard and bantam. I will often pen up young troublemakers until they mature more if necessary.It depends on the rooster, I have indeed had a couple jerks too.
You’re right about how many grow out of it though, sometimes it just takes a while for their testosterone to balance. However sometimes they don’t grow out if it and can be quite aggressive, it’s just a gamble I suppose. But I will say the MAJORITY tend to be sweet gentlemen!
Bantam cochins are one of my favorites and I always have a few running around. They are funny little guys.