I had three males in with the hens. I had no idea they were roosters, too young. Two of them were chased constantly and getting pecked. I took these two out and they were quite. In my opinion a rooster should check his surroundings first and then introduce himself to the ladies. Mine did a...
If he is nice with the girls, keep him. As it was already said, he should calm down with enough hens around him. I usually let my hens decide which male they want to keep.