When I first got birds, I got JJ and two hens. I never had a problem with it. Myrtle died within a month of getting her I got them from a place that was not healthy for birds it is amazing any lived. JJ never bothered the hens too much and even when it was just JJ and Ethel he never over did it. This spring I have 3 hens with Sidekick and just Ethel with JJ and everything was fine. I never lost any feathers from the girls backs.
However, watching turkeys mate is NOT for the faint of heart it is a little rough, I think turkeys are into bondage, S&M or something like that. I feel so sorry for the hens whenever I see it happen.
Yikes - thanks for the heads up on turkey mating - haven't witnessed that yet (and I'd have probably thought they were killing each other)