The Heaviest Bands You Can Think Of

older Cathedral
Evoken
Reverend Bizarre
Pitch Shifter (Industrial)
older Godflesh
Shape Of Despair
Neurosis
Solitude Aeturnus
My Dying Bride
Type O Negative
Amorphis(first two)
Candlemass


Various early 90's swedish/finland death metal acts.
 

Great band - I have all of their albums, fact fans. I even went to fucking Poland to buy them! (Well, not quite, but while I was there I filled my boots with metal ;) )

It all depends on what you mean by heavy. If you mean quick, brutal, well, there are a fucking dozen bands that push past my acceptable envelope. What are they called ? I couldn't tell you because once they're too heavy for my tastes I couldn't give two flying shits about them.

Now oppressive atmosphere, and that feeling that makes you want to make the "claw of anguish" hand gesture while you listen to it ?

Well, fuck, stuff like Crowbar, Runemagick et. al. is Heavy in that respect :)

EDIT:

Behold, the claw of anguish

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Tortured Conscience (Every Knee Shall Bow)
Crimson Thorn (Unearthed)
Mortification (Scrolls Of The Megilloth, Post Momentary Affliction)
Crimson Moonlight (Veil Of Remembrance)
Vomitorial Corpulence (Karrionic Hacktician)
Encryptor (Encryption)