^Big yes. Had a few days several weeks ago when I had this album on repeat all the time. So surprisingly much going on there.

Jetsun Mila and L'ile Re-Sonantes are also both really great Radigue pieces.

Great thread.
I don't think Phill Niblock is mentioned. I listened to two releases/albums: Music by Phill Niblock and Touch Works: For Hurdy Gurdy and Voice . There isn't anything of the former on youtube (and I don't feel like uploading now), so here's from latter.

"Hurdy Hurry" (hurdy gurdy is played by Jim O'Rourke)

Best minimalist composer?

For me, it's a tie between Charlemagne Palestine and Terry Riley with LaMonte Young as a strong contender. If John Cale made more work along the lines of the New York in the 1960s series, he'd be an easy choice.

My vote goes to La Monte Young

Steve Reich
Henry Flynt

if you want the more popular appeal, then Philip Glass