Bach: at least 3 or 4 Preludes & Fugues from the WTC, a Partita or Toccata and/or either an English or French Suite.
Mozart: a couple of sonatas and a couple of piano concertos.
Beethoven: at least 4 or 5 sonatas, including the major piano sonatas, "Waldstein", "Appassionata", Op. 109, 110 or 111
2 or 3 of the concertos.
Schubert, at least one sonata
Schumann: One or two of the major works Carnival, Kreisleriana, Davidsbundlertanze, Fantasia or Symphonic Etudes, the piano concerto
Chopin, one of the sonatas, at least 6 or 7 of the etudes, and a selection of the scherzi and ballades, at least one of the piano concertos.
Liszt, a selection (at least 3 or 4) of the various etudes, one of the piano concertos.
Brahms, one of the sonatas, at least one complete set of the later solo piano works.
Debussy, a selection ( 3 or 4) of the Preludes
Prokofiev at least one of the piano sonatas and one of the concertos
Rachmaninoff, at least 3 or 4 of the preludes and etudes, and one of the concerted works
At at least 3 or 4 major works of a 20th century composer. (Berg Sonata, Barber Sonata, Copland Variations, Corigliano Etude Fantasty, Messiaen Regards)
I think that this would be a pretty standard rep list for most pianist who have a DMA in piano performance.