I've kept mine with Malawi Peacocks, now he's in a tank with the peacocks, a severum, parrotfish, JD, rainbow shark, emerald corydoras, and a black ghost knife (I had a tank crash, and am waiting for my new 125). He gets on fine, chases all but the sev and ghost. Hasn't killed anyone, just chases. They are conspecific aggressive--will even kill opposite sex. Can get to 14"--such beautiful fish. I'm putting him in the 125g with the Sev, Ghost, and JD.
They have pretty big mouths . . . . lol