The Best Piano Works of the 20th Century

Trilogy, Karn Evil 9-2nd Impression - Keith Emerson
Gymnopedie - Eric Satie
Ecologue for Piano and Strings - Gerald Finzi

I was going to nominate Modest Mussorgsky’s "Pictures At An Exhibition", but during a little research learned that though the work became very popular and often performed after orchestrations were written for it in the early 1900’s, most famously by Maurice Ravel in 1922, Mussorgsky’s original piano transcription was written in 1874, and published in 1886, five years after the composer’s death. I love the work, both as performed on solo piano, and with full orchestration.

The works of Conlon Nancarro for player piano! I have a multi - CD set of these!