Heaviest Song Ever!

you obviously are thinking about a different band

No. I listen to Dopesick and Southern Discomfort quite a lot ('Depress' is still one of my favourite songs, although I don't really know why), especially when I'm with certain friends. I'll admit the vocals aren't really that high pitched, I couldn't think of a way to describe them really, but I'd prefer if they were a bit lower and more 'growly'.
 
Dark Funeral - Goddess Of Sodomy

Deicide - Scars of the Crucifix

Dimmu Borgir - Puritania

Mayhem - Deathcrush

Megadeth - Burnt Ice

Cannibal Corpse - Stripped, Raped And Strangled :worship: the riff
 
By heavy do you mean most brute?

I'd vote bands like meshuggah, periphery and any other bands that have walked the ladder to playing 8 string guitars