He's a beautiful roo. I wish you were closer, I'd take him in a heartbeat.
I'm sorry if I missed it, but do you have enough hens to support two roos? Size means nothing to roos and if your banty is dominant, that may never change. It could change, with the big boy trying to take over the role of alpha roo, but you could cross that bridge when you come to it. I'd be more concerned about the wear and tear on your hens if there's not enough to go around.
If you absolutely cannot keep two roos, I'd either learn to cull myself or find perhaps a relative or friend willing to do it for me. That way you are not running the risk of having a stranger cull, who may or may not be humane about doing it.
I personally cannot cull my animals; even though I eat meat. My DH does it for me. I am bothered enough by nightmares as it is due to a seizure disorder, I don't need to add fuel to the fire. If that makes me a hypocrite, so be it. It is what it is.
No need for anyone to get snarky or be rude to a newbie. The OP was asking a legitimate, honest question. BYC is all about friends helping friends. I'm sure there's a forum for comedians somewhere on the net.