Each of my pens has 3 roosters in it. The bantam pen has 2 lemon blue/Brown Reds and a D'Ucce. The big bird pen has my two EO's and a blue wheaten Am rooster. While all 3 of the bantam roos hang out together and crow at will, Big Fella, my darker colored EO rules his pen with an iron fist - no crowing or breeding allowed by anyone but him! Otherwise there is no fighting or fuss between them, at least not so far. The other rooster is actually more traditionally colored with a nice comb, but Big Fella is my favorite no doubt. When I catch hens in the pen and they fuss, he runs up and pecks them, not me.
My dominant EO does not allow crowing by the other roo either. In fact, I was in the coop this morning when the submissive roo attempted a crow, and I had to get out of there in a hurry. No one gets hurt, but there is a wild chase!