Béla Bartók: Concerto for Orchestra (1945)

Chicago Symphony Orchestra, conducted by Pierre Boulez.

One of the 20th century's masterworks, Quatuor pour la fin du temps
by Olivier Messiaen (1908-1992). Excellent recording with score; the
YouTube link has detailed notes and starting times for each movement.

Blue in Green, lead sheet

Bill Evans, "Blue in Green," take 3.

Bill Evans, "Blue in Green." Recorded by Miles Davis on Kind of Blue, 1959.

Beethoven, Diabelli Variations

With score; Alfred Brendel, piano.

Bach, Goldberg Variations - Glenn Gould, 1981

J. S. Bach (1685-1750), Goldberg Variations, BWV 988. 

Glenn Gould, piano (video, 1981)

Bach Goldberg Variations - Glenn Gould, 1955

J. S. Bach (1685-1750), Goldberg Variations, BWV 988. 

Glenn Gould, piano (recorded in mono, 1955)

Brad Mehldau, "Resignation"

From his 1999 album "Elegiac Cycle"

Shostakovich Prelude and Fugue No. 1 in C Major, Op. 87

Performed by the composer.