If you are not worried about spawning them, Heterandria formosa, Lucania goodei, Fundulus lineolatus would make good tank mates as they are found in the same waters in the southern states. Lots of vegetation is a plus.
What darters are looking at? swamp darter, mud darter, and tessellated darter should do well with the named species.
What darters are looking at? swamp darter, mud darter, and tessellated darter should do well with the named species.