THE HEAVIEST EXTREME METAL BAND EVER....
My Chemical Romance. Ha! I jest, but who is THE HEAVIEST EXTREME METAL BAND EVER? My vote goes to Circle of Dead Children.
"I'd always look at their bodies when I was done....." - Hermes,The Suffering
This tread might be dead by now but...
...what about Electric Wizard?
Then again, I'm not what you would call a real metalhead. But EW is, imo, HEAVY! Definitely not fast and with no gutteral vocals. But heavy. And thick. Probably more stoner than anything else.
And I recently found out about a UK band called Dragged into Sunlight. That to, is some crushing stuff.