Just goes to show you how different personalities of fish can prove counter to their reputation.
I've never had a baneschi that wasn't timid, at their best, mine have held their own. Others say the same thing about Red empress or Blue Dolphins but I'll tell you that I've had Red Empress that have behaved like your peacock or worse, and my 4.5" blue Dolphin is presently king of a tank with 7" Tyranochromis and 7" D. Kwinge and 7" Phenochilus and 5" n. venustus. The guys is just plain evil!
Conversely, my Nimbochromis Livingstoni has always been a pussycat giving no problems to anyone.
But certainly, Jakes are more likely to be more dominant than stuartgranti types.