i'm very picky with derpstep because i feel like most of it is, as rusko described it is "noise for the sake of noise." IMO, it's very hard to find good "obscure" dubstep artists because it seems like for every one good artist, there's 99,999 terrible ones. i'll just post a few songs i like:
>RUN DMT - Baraka's Theme
http://www.youtube.com/watch?v=pWpPsdgof2s
>Bassnectar - Wildstyle Method
http://www.youtube.com/watch?v=sq_Sko8wW6U
>Zeds Dead - Pyramid Song
http://www.youtube.com/watch?v=iHKkppVXHxQ
lol, i'm kinda drawing a blank since i don't listen to much derp anymore. my favorite is bassnectar though. he may not be obscure, but he's definitely underrated.