I did peacfull fish big enough to not get eaten and not to big to pick on or eat the tigrinis.
I had chocolate cichlid's (temporalis), severums, Jurupari, prochilodus and uaru with one in one tank.
I did a slightly more agressive group with another one, including a silver arowanna, polypterus Ornatapinnis & Delhezi, Tiger Datnoid, sleeper goby and red hooks.
These all worked out well for me, no picking on (or eating) each other. My Tigrinis were kind-of wimpy.
Joel