Yes, probably Tonic are
#1 . I forgot about Bees Knees, they do seem pretty popular now. I don't really like their bottles (old and new), and trying to not get into more and more brands, but they do make some nice polishes and I have 4.
I was thinking Different Dimension, Cupcake and Glisten & Glow as well as KBShimmer also have large fan bases, but don't know if they're still that popular on the whole. I do like Different Dimension especially, but she doesn't bring out many collections, I think the Holo Hookup probably takes up a lot of her time.
Pahlish must be quite popular still as well.
I personally have gone off Femme Fatale and Glam Polish a bit, as well as Lilypad Lacquer, she only does HHC and PPU now and I'm not paying $15-16 for one of her polishes.
I think I'll be placing another large order with EdM as her new collections are gorgeous and she was talking about an anniversary sale at the end of May.
Tonic are releasing 5 new colours at the beginning of May as they had a lot left over from Polish Con. There goes my May budget....