Favorites Alone In Quiet Darkness

Vikingur Olafsson - Johann Sebastian Bach - piano solos.
Evgeny Kissin and James Levine -  Schubert The Carnegie Hall Concert - four hands.
Simone Dinnerstein - Something Almost Being Said - Bach and Schubert - solo piano.
Isabella Faust - J. S. Bach - Sonatas and Partitas - solo violin
Lucia Micarelli - Meditation from Thais - Jules Massenet - violin and piano (Lang Lang).
Keith Jarrett - Jasmine.
Pat Metheny - One Quiet Night.
Ben Webster - Ben Webster meets Oscar Peterson.
Eva Cassidy - Songbird and Simply Eva

Pretty much anything by Nick Drake

I'm surprised no one has mentioned Van Morrison's Astral Weeks. The whole album start to finish. Wow. And I do not even do drugs.

Off the top of my head

Miles Davis - In a Silent Way
Jefferson Airplane -  Surrealistic Pillow
Pat Martino - Starbright
Pat Metheny - Bright Sized Life