When I want some ambient music, what I turn to is...
1. Aglaia - 3 Organic Experiences
2. Biosphere - Shenzhou
3. Biosphere - Substrata
4. Elegi - Varde
This not a comprehensive list of all ambient music I like, but the absolute favourites so unlucky Tim Hecker, Steve Roach etc. Also this is only counting pure ambient; stuff I might put on while working. Ambient dance like The Orb or kosmiche music like Tangerine Dream is not being included.