FuntCase, Genetix, Crissy Criss, Cookie Monstah, Rusko, SKisM, Zomboy. Not sure if famous enough, but still great artists.
Just lurk around Dubstep labels, like I do. Also great ways to discover music (not only dubstep) are mixes (http://wewillneversaydie.com/mixes/ Never Say Die Mixes are so OP) and discogs (http://www.discogs.com/ for lazy ppl).
Nikosefs posted old ("real") dubstep artists, mine are brostep (heavier, "filther than your mom" etc)
start watching get darker tv episodes at youtube and check the tracklists,most episodes got them full at description,im sure you will find many diamonds in there.