microgeophagus ramirezi (Blue Ram) Dwarf cichlid very pretty I have some in two different tanks. They have personality and beautiful coloration as well as not paying much attention to those around them big or small.
Try an African Oddball set up It was probably one of the more fun tanks I had. 12 Congo Tetras, 3 Ctenopoma, an African Brown Knife, and an Albino Senegal.