Sheesh! That is the "stink eye" in the first picture, for sure! You can, of course, try to tame "him", but you said yourself that you will eventually "harvest" the roosters. Maybe do what you have to do now? Easy for me to say, of course, this would be totally difficult for me. I'd probably try to tame it, too. I mean, I'm the one who tried to save a new-hatch that was nearly pecked to death by momma - bloody, raw, with internal organs hanging out.
I have heavily depended on advice from these good folks on the forum. and I've never been steered wrong. You should, too.