Welcome to the BYC flock! We are glad you joined us!
I have had as many as 8 roosters free-ranging at a time, with all the hens, and we have never really had any issues. They were raised together and had their positions in the flock already well defined, so I am sure that helped keep the conflicts to a minimum. If I were you, I would be more concerned about your hens and the "abuse" they will take having 2 roosters around. As Drumstick Diva mentioned, a ratio of one rooster to 10 hens is much better for your hens as far as keeping them happy and safe goes. Good luck!
I have had as many as 8 roosters free-ranging at a time, with all the hens, and we have never really had any issues. They were raised together and had their positions in the flock already well defined, so I am sure that helped keep the conflicts to a minimum. If I were you, I would be more concerned about your hens and the "abuse" they will take having 2 roosters around. As Drumstick Diva mentioned, a ratio of one rooster to 10 hens is much better for your hens as far as keeping them happy and safe goes. Good luck!