Thorr's Hammer (not to be confused with the Viking metal band)
Burning Witch
Sunn O))
Beyond Black Void
Skepticism
Thergothon
My Dying Bride
Anathema
Katatonia
Agalloch (not doom per se but worth checking out)
In The Woods...(same as above)
Opeth (same as above)
Shape of Despair
Unholy
3rd and the Mortal
Morgion
Mindrot
Left Hand Solution
early Beyond Dawn
Funeral
Teeth of Lions Rule the Divine
Khanate
Solitude Aeternus
early Paradise Lost
Cathedral
more stonerish bands:
Boris
Electric Wizard (listening to them sober makes me feel stoned-thats how good they are!)
Internal Void
Eternal Elysium
Pentagram
Trouble
The Obssessed
Kyuss
Sleep
Abdullah
The Want
i forgot a few...
November's Doom
Warhorse
Neurosis (not doom but would appeal to any doomster)
Bethlehem (same as above)
Winter
Evoken
Esoteric
(EVERYONE SHOULD LISTEN TO THEM)