cuban cichlids would look nice in there i have one you can have for free if you want, its only about an inch though. aquascape has some super sweet wild trinidad oscars.
A jd, Midas Maybe even the Cuban might work as tankmates.Don't think I'd try the Oscars or other parachromis.Oscar isn't aggressive enough and parachromis usually hate similar looking fish. But then if Your jag turns out to be mild?