That's all post-rock.
If you want acutal music centered around ambience, I'd suggest
Brian Eno - Ambient 1
Brian Eno - Ambient 2
Autechre - Amber
Sunn - Black One
Sunn - 3: Flight of the Behemoth
Black Dice - Beaches & Canyons
Set Fire to Flames - Sings Reigns Rebuilder
That should be a good start. If you like it, or need any of it. Pixiesfanyo is my AIM.
