You could get a few male guppies. I'm not sure how they would be with the ADFs, but my guppies are quite friendly. I think that they are a bit nicer than platies, but the two species can also get along. You could also get a few zebra danios with some black neons or normal neon tetras. If you were careful enough you could also put a male in, or do a sorority instead of a community.