Queenie: Extremely fat for no reason= dropsy
Ember: Cloudy eyes and extremely fat = popeye and dropsy
Suki: you call it bloat, but you said pinecone as well= dropsy
Rose: clamped fins? is she fat too?
Something tells me you should be doing water changes once a week if all your females are dying of dropsy and popeye :S In my opinion, that is what this sounds like. but your females have so many symptoms, and so many dying at the same time, I can only think of water quality being unsuitable for them. But I don't know since all your other fish are fine.