I haven't had any of the fish you have except the lab, but I've read that in male tanks you shouldn't have 2 fish that look alike so maybe getting rid of one of the red peacocks is something to consider. Also I believe labs like to be in groups so you might want to get rid of him too. He will probably always hide. Then I'd get busy filling it up lol. It's up to you what you like to stock with. Hopefully someone else can help more. Like I said, I'm not familiar with the fish you have left except the lab. Good luck & have fun.