nandus would be on the list but i cannot afford or house live feeders, and apparently it is hard to get them off it. i think an exodon tank would be good
Not hard to break them off live feeders but it takes some work. But can't go wrong with a group of exodons especially if readily available in South Africa.
Exodons are great to watch. Always swimming and super active. Just make sure to get a big group as they'll pick on the smaller weaker ones. I started out with 18 in my 135 gallon and I'm down to 16 because of aggression. Great little mini monsters.