what's wrong with gold gourami and pearl? male pearl, the only male in the tank, very rarely harrass blue, silver or gold gourami.. he has a thing for the female pearl and it's mostly during meal time, and blue female occasionally harasses goldie...I'm surprised that gold gourami exists with the pearls and is that a kisser too?
I know with my male blue gourami has zero tolerance for any other fish in with him that's of similar size, shape, etc.
I do have a pink kisser and an angel in one of my planted 55s that have tolerated each other for some time now.
I don't think it's a kisser gourami, I've never noticed its lip look like kisser when she yawns, I was told here it was called silver gourami.
Overall they harass each other very little, my favorite is silver because she is the most peaceful in the tank