Yea, something like angel fish or rams would be nice. If the tetras are neons, however, then I wouldn't recommend angels because of stories I have heard about angels eating neons.
my gold gourami would relentlessly chase my gold ram when introuduced into my 36 gallon. Eventhough I have lots of plants and caves, he would actually hunt for him, not just chase him when he'd see him. I'm not sure about the dwarf's vs Rams but my wife's dwarf gourami tank does have its bullies. We noticed her redfire gourami has half of his upper lip missing. We are not positive it wasn't like this when we bought him but the neon blue gourami constantly chases him and the smaller dwarf. Might be something to think about, Kyle