I absolutely love my keyholes. They would be perfect if you can get over the dull coloration. I have two and they are aborable and be bop around the tank together. I also am in love with my Rainbow cichlids. I have a pack of three and they are perfecto. They have much more color and are just as peaceful. I have yet to see a bit of aggression out of them. They have special teeth for algae eating. This makes them unique and the only one in their genus. Acaras are a bit all over the place as far as aggression. I would go with a couple rainbow cichlids. They are wonderful for planted tanks or any tank really. Also hoplo catfish are really something. They are funny critters, always busy. I recommend.