Thanks for the great info, Mike.
Do all of these require live foods (particularly the darters) or can they be weaned onto cichlid pellets, shrimp pellets, or frozen foods as a staple?
All sunfish adapt quickly to pellets and other dried foods, just don't feed them for the first week or two so they're good & hungry.
Darters are best maintained on high-protein live/frozen foods. All are snail-eaters, especially the Green-Sideds, who can clear a tank of Maylasian live-bearing snails. Black worms, blood worms, brine shrimp, glass worms are all good; Black worms being favored. If you load the tank with good-quality black worms at night, the darters will seek them out all day long.
Note that all darters have a very high metabolism and must be fed often, or they'll waste away.