Dwarf fish for instance Guppies and Danios, Corydora catfish, pigmy suckermouths, teams of barbs or tetras Most Central and South American cichlids is often held with a number of aquarium vegetation, but African species are tougher to pair as a result of water parameters. It isn't really unachievable though! See https://pearlaquatics.my/top-priorities-of-any-aquarium-owner/