Any other fish you would recommend to manage aggression in the future? I sent my wife a picture of the julidochromis and she isn't sure its her type, not to mention I have never seen any here at the stores we go to.
most mbuna with a bit of a mean streak and are not similar in colour should be a good mix in a large enough tank. the biggest thing to avoid in tankmates are vertical dark bars and a bluish tinge. M. auratus might be a good mix if you find them.