Lesser known rock bands and/or more k-pop

I know as far as K-pop there are two playlists but I havnt noticed much diversity theres plenty of great artists that would be great to have either in another kpop playlist or as artist playlists. Also there plenty of rock/metal bands that aren't as well known in the mainstream media that I know plenty of people would enjoy having in the game like pierce the veil, a day to remember, set it off, etc. There are a few songs here and there like in the metalcore playlist but as for artists playlists there aren't any.