I also mix Africans and South Americans as well, along with a few community and a RES turtle. All are happy and healthy, about 6 months ago I lost 2 parrotfish to a Red Devil who has since been re-homed due to aggression, AVOID them, he even started attacking my oscars who were twice his size. My current stocking list (which I'm sure I will catch grief about) 2 Oscars, 2 electric yellow labs, 2 red fin tinfoil barbs, 1 albino zebra, 1 convict, 1 parrotfish, 1 common Pleco, 2 rainbow sharks, 1 RES, 1 Spotted Gar, 1 Kissing Gourami, 5 electric yellow/hybrid fry. 125 gallon tank. All are happy and healthy, no aggression other than small tiffs between the Zebra and Pleco who doesn't pay him any mind.