I have several flocks that free range, with several roosters, they pretty much keep to their own group with sometimes a roo trying to grab a new hen, typically the hen stays within her flock and the roos stand between, not alot of fighting, but I'm thinking of loosing another roo and since it's fall, maybe it won't be too bad, if spring - forget it... cooping them up is different, each roo (that could damage the others) must go to his own secure box, since I'm not going to open the door at 5 am, and I don't want to hear a major fight and see a little roo dead...it takes a few days, and still, one roo keeps trying to get locked in the hens flat! Yesterday the hens where actually 'hiding' him in the corner, and he was crouched down, so I wouldn't notice, ha ha, nice try.
I think alot depends on how many you have and how much room to range them, as long as the weaker ones have cover you should be ok, if not, the easiest time to grab a roo is when he's got another one down.