Theres so MANY its not even funny. lol do you want color, action or what? I have peacocks and haps, they get a bit large but have astonishing colors when they get older. I used to have mbuna, great fish but very very aggressive and should be kept to themselves. Mbuna would allow you to have a good amount of fish as well. But you have to be careful as far as male female ratios or you could have a world war in your tank lol