I wouldn't mix Pundamilla species with the Kyoga's because the Pundamilla are too aggressive for them. You could definitely do the Paralabidochromis Chromogynos (fish in my avatar) The things you have to look for is finding a species where the females are totally different. You are not going to have a lot of options as the Kyoga females look pretty much like all other females. If you don't want to breed and don't plan on saving fry you could mix quite a few different choices. I would still stay away from Pundamilla though.