I cant believe some of these havent been mentioned yet. The following albums are some of my favorites:
Officium Triste - Giving yourself away
Saturnus - Veronika Decides to Die
Swallow the Sun - Hope
Swallow the Sun - The Morning Never Came
Daylight Dies - Dismantling Devotion
Hanging Garden - Inherit the Eden
In the vein of A Storm of Light, I guess. Post-rock/sludge heavy stuff.
These guys are doom giants.
If you like Conan, I assume you've already heard their split w/ Slomatics and their latest album, Monnos, but I'm going to post it anyway because it's so heavy. I can still feel my organs vibrate from their gig 2 weeks ago.
Slomatics.. Well, if you're heavy enough to do a split with Conan, you're heavy.
Horn of the Rhino perhaps? Don't let the man-beast ..... on the cover demotivate you...
Not really doom but since you like A Storm Of Light I guess some "post"-y material would be OK.
Not sure if it's Youtube compression ....ing up or my speakers but on CD/Vinyl all of these sound a hell lot heavier. Grab the CD or whatever and play them over your surround set.