In no particular order

Beethoven
Bach
Rachmaninov
Grieg
Chopin

All time favorite if I had to have just one... Probably Grieg.

1 Mozart
2 Pachelbel
3 Beethoven
4 Tchaikovsky
5 Chopin

-Mozart
-Bernstein
-Chopin
-Puccini
-Shoenberg
:clap:

Not in order of merit:

Beethoven
Debussy
Elgar
Mahler
Shostakovich

Bach!

And who would want to be without many of the others already listed?

Rachmaninoff, Sibelius, and Scriabin (late piano music, at least) are sadly under-rated. When I mentioned that Sibelius lived to a ripe old age but composed only during the first half of his life, a friend once said, "We're grateful." But isn't he now on the verge of a revival?

Just to add a few more unusual-- I'm inordinately fond of:

Charles Tournemire (precurser of Messiaen)
Frank Martin (a musical "anatomy of melancholy")
Herbert Howells
Kenneth Leighton

JS Bach no doubt!
Ludwig van Beethoven
Fredrich Chopin
Sergei Rachmaninoff (<3)
and I'm not sure about the fifth one.
Maybe Haydn.

Beethoven, Bach, Mozart, Tchaikovsky and Lady Goo Goo, I mean Gaga. No wait, Chopin.

1. Beethoven
2. Schubert
3. Vivaldi
4. J.S. Bach
5. Mozart

All but 1 are subject to change.

1. John Cage
2. J.S. Bach
3. Arnold Schoenberg
4. Edgard Varese
5. Karlheinz Stockhausen

Wow, finally someone who probably appreciates Stockhausen as much as I do.