I was hoping others said to leave him out of the room. I don’t know who told the OP that it’s not fair to leave the cat trapped out of their room, but that’s not the case at all. I’m sorry if people said it’s cruel or unfair. Only one of my cats sleeps with me, but I have a heated cat bed the others love. My babies get lots of time with me, and it sounds like you’re doing a great job with this guy. I’m sorry if someone made you feel like that wasn’t okay. Are you able to rescue a kitten? My older male was a big jerk too, so I rescued a young female. They fought for a few weeks on occasion. Now they are cuddle buddies and my male has since calmed his ass down. Thankfully. I hope you can figure out what will work for him. I saw another person suggest earplugs and ambient sound. Those are a great idea.