Temnozor are great, as are Vinterriket. Vinterriket are ambient most of the time, just in case you didnt know. I believe their last one was completely ambient.
I've heard Clandestine Blaze and Celestia but don't remember much.
i've heard some azaghal mp3s and i wasn't too impressed, pretty dull really.
i have winterschatten by vinterriket, but i'm waiting for some snow for that one