There was a band with brief existence from Saskatoon called 'pericardium' that could rip shit up. For neat drumming definately 'Mundane,' a Canada/Portugal band.
but I can't not mention Strapping or Cryptopsy.
And let's not forget the crudest band ever... THe Dayglo Abortions.
For those intersested in checking out the Canadian metal scene, try finding a compilation called 'Into the Blizzard' on Skyscraper records.