great list,
I also like Candlemass, Pentagram, Saint Vitus, Electric Wizard, Eyehategod.
some of my personal favorites are Acid Bath, Fleshpress, Sleep, and Sons of Otis
[h=1]Acid Bath was the band that opened my eyes to doom.[/h]
I don't listen to a lot of Drone, myself , but it sometimes does something for me.
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Checking out those bands you mentioned that I haven't heard, especially the death/doom.
So far, I am really liking Unholy.