Apart from the breed question, the best idea is to find an adult roo that has been raised around chicken people. Instead of raising him with the girls, let him raise them. Check CL and other sources, there are many people with excess roosters that need homes. Do your sanity a favor and find a farm nearby where you can make a visits and observe any potential roo before taking him home. Even if you wind up with a roo or two in your order, that adult roo will see to it that he knows his place. If the time comes to pass your cockerels on to other families, they will have had the advantage of actually knowing how to be a rooster, daddy bird, flock protector and manager, and family friend all wrapped up into one. I have 11 RIR pullets (just beginning to lay), 1 RIR cockerel, and mixed adult rooster. They all get along great with the roosters roosting together quite often. Of course they do have a few tussles over the ladies throughout the day, but the cockerel knows to back down.
So far I have had to grab him by the neck just once. He started biting me on the hand (a bite and twist) if I tried to touch him. I don't mind the peck, or voicing his displeasure if he doesn't want to be touched, but the bite/ twist was a little much. I started backing him up, and eventually caught him in the coop at roosting time with my hand around his neck. No biting since.
So far I cant really complain about my RIRs, pullets or the cockerel. For a roo to do his job within the flock, he has to be dominant. No matter the breed, even the roo needs to know the pecking order starts with you. Let him handle day to day operation of the flock, but when you or family are present, he needs to know his place. I think having an adult rooster will go along way towards flock management. He will keep the flock in line, and step in anytime things get out of hand. Do remember, that like human adolescents, young females tend to pick on the males before they get their size. The roo will keep that down, so that the young roo doesn't grow up with that chip on his shoulder.