As much as I find JYP these days to be extremely embarrassing, it just doesn't feel right excluding them from the Top 3 because of how big a footprint their artists left on kpop. Wonder Girls were pretty much the it girls until 2009/2010, 2PM were pretty popular in their time as well and they just had a successful tour in Japan and successful singles there as well. I don't know what Miss A's sales are like but Suzy seems to be everywhere
I like Cube's artists more but they don't really feel like a powerhouse since Beast is declining, 4minute's album sales were abysmal (and both of them were reported to have bulk bought) BtoB and G.NA still haven't made any breakthrough, A Pink seems to be getting there but I'm not sure what their sales are like
Hey, neo neo neo come back to me baby
neoneoneoneoneoneoneoneon (Big Baby Baby)
Hey, neo neo neo wanna be my baby
neoneoneoneoneoneoneoneon (Big Baby Baby)