There are so many levels of obscurity.

Here's some obscure for you to go try out:
KiNK (IDM)
Safe/Mode (industrial)
Razornaut (drum and bass)
Acid1 (breakcore)
Underscore (electronic)
Zeropage (ambient dance)
Altemark (breakcore)
Hotelsinus (drum and bass)
Xenobioz (drum and bass)
Stud (glitch)
Kmotiv (downtempo)
and some less obscure:
Ivan Ives (hip hop)
Yat-Kha (tuvan rock)
Dog Fashion Disco (rock)
and not really obscure, but not super-popular yet either:
Tub Ring (rock?)
Stolen Babies (rock / metal)
Karma To Burn (instrumental rock)
If you're listening to any of that, that's pretty obscure stuff. But I know that's not even the bottom of the pile, but it's close.
