There are a lot of options Ben. You have some that are are on the more aggressive side, so I would stick with others with like personalities. Some suggestions... fryeri, yellow lab, red top hongi, cobalt, demasoni, acei. Basically I think you woud be ok with just about any mbuna. There are a few peacocks and haps that could hang with these fellas too.
looks like hes got a lot of fryeri in him. very nice.