Take him off his roost at night, wrap a towel around his wings and loosely cover his head without restricting his air.
Once again, unless blood is being spilt, chicken politics is best left to chickens.
Or blunt his claws and one remaining spur. I wrap them as Shadrach said, in a sheet or large towel, lay him down, and hold onto the feet. The claws and spurs have a quick in them that will bleed if you nick it but that does not go all the way to the tip. Usually if I take off less than 1/4 of the length I miss the quick.
I think you've been given a lot of practical advice here.
Obviously you are emotionally attached to this male, who does meet one very important criteria of not being aggressive to humans, but he doesn't seem to be doing well as a flockmaster in taking good care of his girls.
You've got a pretty high rooster to hen ratio at 1 to 6. I don't know if you've got the space for more birds or could deal with more eggs, but since your 2yo girls are probably going to molt and then lay fewer eggs after the molt this might be an opportune time to add more females -- maybe of some larger breeds with good, thick feathers. My Brahma and Marans girls have withstood 2 competing males with minimal feather damage/loss.