artists you wish people knew about

Hmmm, Eluveitie, Black Kirin, Bathory, apocalyptica maybe? That should cover some range for you to try different things (although they are not obscure either). Demetori is really cool imo; but it's doujin so """amateurish""", and specifically around Touhou fanbase.

For rock... 珂拉琪 Collage, there's a Light, Toe, DSPS, MASS OF FERMENTING DREGS, a picture of her, Itsue...
Those are more post rock, experimental, shoegaze, math rock though

Bathory! U dont move me i dont give a fck!

swell foop is so underrated

Valse Triste - Hyasti Nielurisat ...not as frenetic as most Finnish HC bands I knew, but not a bad EP if I recall

United Mutation

Hyvästi nielurisat is EP yea. But didnt like only 600 copys of it get releaced?

But anyways i heard it somewhere once and liked it. Havent since been able to find it properly anywhere.