It depends on your roosters, honestly. I have several roosters in the same enclosure as the hens and have never had a problem with fighting.
You will have to test it out for a few days to see how your roosters react, every individual is differently.
Mine when raised together do not fight much, though it certainly depends on each bird. Some will fight, I also keep one on the flock, and a couple in backup or for breading in small runs by them selves.