Classics you can't have too many recordings of

Please share your favorite compositions that you just can't have too many recordings (interpretations) of. For me it's " Pictures at an Exhibition"
Bach's Mass in B Minor and Brandenberg concertos; Beethoven's Eroica, Fifth, and Ninth symphonies, and piano concertos; Gershwin's America in Paris and Rhapsody in Blue, Mahler's Das Lied Van Der Erde; to name a few.
Dvorak's 9th, Tchaikovsky's violin concerto, Rachmaninoff's vocalise, 2nd + 3rd piano concertos, Dvorak's violin concerto, Brahms' 3rd + 4th symphonies, Beethoven's 5th, Prokofiev's violin concertos, and several of Mozart's symphonies. But there are just so many more.

Bach's cello suites
Count me in for "Pictures at an Exhibition"
Any and all and In no particular order of the following fab three;
Puccini, Rossini and Verdi,
Bartok. Any Bartok. Never enough copies of Bartok's works.
Shostkovich's 24 Preludes and Fugues

Monk's Blues (well, I think it's a classic)
Beethoven's piano sonatas. Beethoven's quartets. Beethoven's Symphonies. Did I mention I like Beethoven? Then there is Bach. The Matthew and John passions. The cello sonatas. The Sonatas and Partitas for violin.
Rachmaninoff, Rhapsody on a theme by Paginini
Chopin, Andante Spianato, etudes, nocturnes and waltzes
Haydn piano trios
Mozart piano concertos
Bach Partitas
Dvorak quintets
Gershwin Rhapsody in Blue
all based on having at least 3 or 4 or more of the above in my collection
Bach Art of the Fugue
Sibelius: violin concerto and symphonies 4, 5 & 6
Berlioz Symphonie Fantastique
Brahms: Symphonies 3 and 4, Double Concerto, Piano Concerto #1 and virtually all his mid to late chamber music, especially the Clarinet Quintet

Dvorak: Symphony #8, Cello Concerto and mid to late chamber music

Sibelius: Symphonies 4 and 5 and Violin Concerto

Vaughan Williams: Symphonies 3 and 5

Mahler: Symphonies 4 and 6

Bruckner: Symphony #5

Tchaikovsky: Symphony #6

Rachmaninoff: Symphony #2

Bartok: Concerto for Orchestra

Beethoven: Triple Concerto
Fugazi 13
Mozart, Mahler, Strauss, Wagner (can you tell I am a horn player?), Bartok, Stravinsky, Gesualdo, Bruckner, Bach, Beethoven, to name 10 off the top of my head, though not necessarily in the above order.