Most achingly-beautiful music

In no particular order:
Simon and Garfunkels "Bridge Over Troubled Water"
Always makes me feel like everything's gonna be ok no matter what.

Billy Joels "Innocent Man"
Always makes me feel like everything is gonna be ok when I'm havin' woman problems.

Joaquin Rodrigo/ The Adagio from the "Concerto de Aranjuez"
Sad, bitter sweet,cerebral,intensely sexual, but hopeful as well. This works on so many emotions and I never tire of it. Julian Breem does this piece exceptionaly well. However, Christopher Parkening's performance is absolutely astonishing.

Bach's cello suite no 2. "Famous blue Raincoat" by Leanoard Cohen. "Fly" by Nick Drake.

Great thread! I have just a couple of suggestions. Gorecky's Symphony For Sad Songs, UTE Lemper's BARABARA, Keith Jarrett, Charlie Haden, Jan Garbarek and orchestra on ARBOUR ZENA.

Getz/Gilberto - everything - gentle and romantic

Neil Young - live, alone, acoustic, small intimate venues (mostly bootlegs) - raw, emotional performances

Pink Floyd - early, live recordings, best before Dark Side of the Moon (mostly bootlegs) - cutting edge (but still accessible) experimentation with music that evokes awe and respect for human creativity (like the Beatles, but we all know about what awesome work *they* did).

Two works by R.Straus need mentioning:Death and Transfiguration--and the trio and duet from the last act of der Rosenkavalier.
Other favorites of mine are the Bailero from Songs of the
Auvergne (Canteloube), sung by Kiri te Kanawa; Deux Arabesques (Debussy), for piano; and the Humming Chorus from the second act of Madame Butterfly (Puccini).
The Gorecki Symphony mentioned above is his #3,
nicely performed by London Sinfonietta with soprano Dawn
Upshaw.