Cloaks 
Cloaks - Versus Grain (3by3) is an essential purchase. Deffo transcends genre's. Rust on Metal is probably the best metal/dub combination I've heard in a while. 
www.myspace.com/cloaks
Scorn
As some have mentioned, Scorn is the long running industrial/ambient/whatever project by former Napalm Death drummer Mick J. Harris. 
Essential stuf includes the Stealth full length and several 12's on 'combat recordings' and his own label 'in the margins'. It's deffo worth it to check out his older stuf as well. Don't you be calling this dubstep though, because Mick will certainly throw a fit if he finds out. 
King Cannibal 
King Cannibal has several productions in the same style as the above artists. Just check out discogs for his releases (I reccommend getting the 2008 stuff, he also did a mad podcast together with scorn for Radio 1 (Marry Ann Hobbes) in that same year which is worth tracking down). 
A quick list of other names : 
- Distance (deffo metal inspired) 
- Legion of two (planet mu) 
- Vex'd : essential for any dubstep fan. All works from 2004 'till 2010 are essential for your discography 
I'd say these are 5 are spot on.