Devin Townsend is one of the coolest people in Metal. Not only is he certainly one of the most talented vocalists, but he's also a fantastic entertainer and basically the nicest guy ever.
He has five times the stage presence of any other given Metal artist, playing alone to an empty room.
/Edit: If you haven't heard of Devin Townsend, he's a canadian musician with a long and illustrious career. Basically, he got big when he went to sing for Steve Vai:
Then he hit it big with his project Strapping Young Lad, which is probably the reason Canadians are nice and peaceful, because all their anger was in that band:
As the insanity of Strapping Young Lad went on, he explored the boundaries of Metal and hairstyles, while also producing some nicer musical trips under the "Devin Townsend Project" name.
His discography as solo artist, guest artist, and producer is IMMENSE.