I love ambient music. Some favorites in the same corner of the genre as Eno:

Pauline Oliveros - Deep Listening

Virginia Astley - In Gardens Where We Feel Secure

Machinefabriek - Slaapzucht

Biosphere - The Hilvarenbeek Recordings (anything Biosphere is sublime but a lot of it is darker ambient than Eno)

I could go on forever. But check these out.

Also, every release from this label is gold:

http://www.slaapwelrecords.com/