Mozart wrote the best series of piano concertos for me.

favorite 5 classical piano composers
 

1. Beethoven
(love the appassionata! gotta check out abiow.com/beethoven-appassionata-hermeneutics/ if you love beethoven and appassionata!)
2. Chopin
3. John Field
(little know classical era composer - a must if you love chopin)
4. Bach (harpsichord - close enough)
5.Lizst

All Best!

abiow.com/beethoven-appassionata-hermeneutics/

Beethoven
Mozart
Brahms
Bach
Mendelssohn

Chopin
Mozart
Schubert
Bach
Vivaldi

Faure (especially the Requiem)
J.S. Bach (the Art of the Fugue, the Keyboard works, The Cello Suites,
The Brandenburg concertos, etc.)
Bernstein (the Chichester Psalms is my fave)
Schubert (the Mass in E flat)
Rachmaninoff (the Vespers and Piano Concertos)

Tchaikovsky
Shostakovich
Bach
Elgar
Dvorak

In no particular order:

Tchaikovsky
J.S. Bach
Gustav Holst (it's hard not to love "The Planets")
Gluck
Chopin

2nded

Way too hard to narrow this down to five.

Rachmaninov (2nd piano concerto "Adagio sostenuto" is the most beautiful piece of music ever written)
Chopin ("Fantasy Impromptu" - amazing tune)
Bela Bartok (Some really good piano concertos, hard to single anything out)
George Gershwin ("Rhapsody in Blue" is incredible, "Porgy and Bess" was genius)
Gustav Holst (Planets does it for me)
Arvids Zilinskis (underrated Latvian composer, "Elegy in Autumn" very moving)
JS Bach ("Toccota in D": my favourite ever organ piece)
Prokofiev (How long does this list go on?)
Scott Joplin (Apart from his piano rags, I'd reccomend tracking down his opera, "Treemonisha", which was his masterpiece.)

Mozart
Bach
Tchaikovsky
Strauss
Mahler