I can't stand balloon mollies. Not only do they look mutated, but each batch of fry contains a lot that can't even swim, and I've received ever so many e-mails and questions from people with balloon mollies that lose swimming ability as they age. I'd love to know why people would want to keep an animal that's been bred so that it's crippled and less able to do its normal behaviours.
Anyway, you've left over lots of the best livebearers. Halfbeaks, pike livebearers, stingrays, and four-eyed fish are all livebearers in good standing and splendid fishes in their own (very different) ways. And then there's all the splitfins, of which I have little personal experience but have to admit many are fascinating and beautiful. And what about the rarer poecilids, like mosquitofish, swamp guppies, and Limia?
Cheers, Neale