Marlieri or another julie could work out if you don't mind pulling the leleupi. That would give you two distinct rock dwellers. Leleupi are pretty brutal with their own, and if lucky, you will end up with one pair. If unlucky, you will end up with one that tries to take over a lot of real estate. I have J. Marlieri and N. Leleupi in a 75 right now, and they work out fine. If anything, the marlieri (smaller--probably Gombe) rule the tank, but not with any overt harshness towards any but their own. You will see your other fish out swimming more if you have a schooling fish like a small cyprichromis leptosoma in the upper part of the tank.