I'm just thinking of a full grown jds aggressivness I guess. the other cichlids will fight back if they get picked on. the tetras, danios and rainbows would just be picked on imo. depends on the jds temperment though.
I dunno. I've kept all the above fish with JDs without issues. I think Cichlidnut has all of them except Congo Tetras currently. Congos are African Tetras so they are a tad more aggressive than most others. Plus they're bigger.