Depends on waht you mean by intense....Septic Death, ENT, Gorefest, Melt Banana. Or things like Arcade Fire...Colour Haze band that i find can be very intense.

Marilyn Manson - All of his music
Lamb of God - All of their music
Stone Sour - Get Inside
Rob Zombie - Feel So Numb
Cancer Bats - Hail Destroyer
Ramstien - Bang Bang

Yeah, but I think they achieved even more intensity with "Harem Of Scorpions".

Haha, ya thats a good one too, that whole CD rocks your face off

AAA- Strapping Young Lad

Such a good song