@hyunemi
Let me name all of the ones I know: Trendz, Black Level, JWiiver, NINE.i, Tan, Tempest, Younite, BLANK2Y, TNX, Superkind and ATBO.
Honestly, the only groups I'd even reccomend checking out are Tan, Tempest, Younite and ATBO, the rest are quite generic nugu 4th gen bg :/