look through your fish book and choose your absolute favourite that is under 2-3 inches
What about some dwarf cichlids - Apistogrammas maybe - in a planted tank with oak leaves as a substrate and lots of bogwood
Or how about an African tank with anubias, bolbitis, and tiger lotus lillies and a pair of Pelvicachromis, Nannochromis etc - there are so many more cichlids than malawis and Kribs