Strapping Young Lad and Devin Townsend by extension.
I just think Devin's method of production is incredible, couple that with the fact SYL changed up their sound with each album it meant that each album was both unique and familiar in all the right ways. Not to mention that both City and Alien are my two favourite extreme metal albums.
Dont get me wrong, I love a LOT of bands, but SYL has also stuck out as THE band I always listen to. Plus their live shows were pretty fucking metal.