Hevy Devy, DTP, Strapping Young Lad, Steve Vai...
Devin Townsend has created a niche market in metal, a genre he calls 'beauty', on account of the symphonic and dynamic structure he incorporates into his compositions... This may not be everyone's cup of tea, and there are metal fans who can't get on with his style, but for my money, there's more value going on here than in a dozen Metallicas...
Dev has one of the most dynamic vocal ranges in rock music which was why Steve Vai picked him for vocal duties on his 3rd solo album 'sex and religion'...