What size tank are they in? You can try some firemouth's, salvini's, and some bigger cichlids like texas cichlids, grammodes(might be too aggressive), and Cubans.
I have a 6 in male ebjd, 4 in female jd, 2 in female con, a 6in fermale parrot, 3 senegal bichirs, 4 kuhli loaches, and 7 buenos aires tetras and a pictus. There is no aggression in my tank at all.