TRAX is a good band
Dear cloud is a great indie band
they made great albums imo
Nell is another great Korean band but most of their stuff is ethereal ballad rock, but good
For female soloist I would recommend GUMMY
If you're interested, for girlgroup I would suggest Brown Eyed Girls, their music is kinda different from the popular Kpop scene and all of the members has solo albums of their own.
Sunny Hill is also good, they have 'quirky' music I guess. Dance-y but not like mainstream Kpop way.
That's all I can think of
