Your scale seems very broken. Sorry, but I think the leap from regular Death Metal (Cannibal Corpse) to whatever the fuck your 11 is supposed to be is retarded. You do know there is heavier stuff than Cannibal Corpse that is actually music? The Faceless, Suicide Silence, The Black Dahlia Murder etc.
Plus, Anthrax to Slayer makes sense, but what about Black Metal? Much heavier than Thrash, not as heavy as Death.
Anyway, I can listen to the heaviest stuff, as long as it's still musically correct, and it still sounds like music, instead of idiots screaming and hitting instruments.
However, my favourite bands sit around your 8 and 9. I do really like Cannibal Corpse, but I love bands like Judas Priest, Iced Earth, Slayer, Dream Theater.