The post above me is pretty on track.
Also:
*shuidder* Baroness aren't bad either, but I put them in the same category as indie rock to be quite honest, not what I look for in great metal.
Boris don't play metal.
Neither do Converge.
Neither do Deftones.
The Dillinger Escape Plan is metalcore.
The Mars Volta? Seriously?
Queens of The Stone Age?
True on all counts. That's not a value judgement, even though I only like two of these bands. There are many others I disagree with as well. For example, if you're going to put Opeth on a list like this, why the fuck
Watershed? And Satan almighty, a Slayer album? This is the 21st century, and Slayer haven't put out anything that was more than mediocre since 1988 on the outside.
Let's try and be positive...at the start of the list I thought it was going to be ok. Dopethrone and The Work Which Transforms God would both make it on to my list. Codex Necro, Phantom Limb and Frozen Corpse Stuffed with Dope are all good albums but probably not my choices.
I feel a little wary making a list personally, because it's all about personal taste in these things, but if I did it would certainly back up some of Damnable Fiend's, as well as considering such tasty treats as:
Aborym - With No Human Intervention
Agalloch - The Mantle
Ancient Rites - And the Hordes Stood as One (if we're allowed live albums) or Dim Carcosa (if we're not)
The Axis of Perdition - Deleted Scenes From the Transition Hospital
Ayreon - The Human Equation
Carpathian Forest - Morbid Fascination of Death
Dan Swano - Moontower
Darkthrone - The Cult is Alive (controversial, I would imagine)
Diabolical Masquerade - Death's Design
Drudkh - The Swan Road
Edge of Sanity - Crimson II
Ewigkeit - Radio Ixtlan
Forefather - Ours is the Kingdom
Horna - Sotahuuto
Lumsk - Åsmund Frægdegjevar
Sigh - Imaginary Sonicscape
Wyrd - Huldrafolk
I'm noting fairly definite tendencies genre wise. For a list like this to be good it really needs to be compiled from the lists of a few seperate people who have some idea what they're talking about.
Also, final note, I personally think Gallhammer are alright! Not sure why everyone calls them a black metal band though. The makeup maybe?