I wish I knew more about minimal music.
Check these out:
Terry Riley- In C, A Rainbow in Curved Air, Persian Surgery Dervishes
Steve Reich- Music for 18 Musicians, Electric Counterpoint
Henry Flynt- You are my Everlovin'
Morton Feldman- The Rothko Chapel, Triadic Memories
Philip Glass- Einstein on the Beach
Tony Conrad- Four Violins
Catherine Christer Hennix- Chorassan Time-Court Mirage live at the Grimm Museum
La Monte Young- anything you can find
Charlemagne Palestine- Strumming Music
Ellen Fullman- Through Glass Panes
Eliane Radigue- Transamorem/Transmortem
you could also check out a bunch of indian classical music. ravi shankar is the "obvious" one, but there are also ali akbar khan, vilayat khan, pandit pran nath, nikhil banerjee etc etc.