1. Bartok
2. Ravel
3. Bach
4. Paganini
5. Haydn

1) Brahms
2) Hindemith


I'll have to think about the rest.

Top 5 great classical artists:
1. Chopin
2. Debussy
3. Ravel
4. Tchaikovsky
5. Liszt

but seriously, there are too many to have only a top 5.

1. Mozart
2. Pachelbel
3. JS Bach
4. Vivaldi
5. Beethoven

My Top 5
 

Schubert - cos of the Maiden quartet
Beethoven - cos of A Minor quartet
Bach - cos of Goldbergs
Brahms - fiddle concerto
Hayden - cos always painfully cheerful (the b&gger!)

Mozart
Bach
Vivaldi
Beethoven
Brahms

Impossible to name only five, let alone to rank them.
Vivaldi - Brahms - Boccherini - Chopin - Händel

Not easy, really not. So rather without some special order...

Mozart, Beethoven, Vivaldi, Antonín Dvořák, Telemann.

Vivaldi and Telemann are in list especially because as a flute player, I love their stuff for flutes.

Chopin, Verdi, G. F Haendel, Bach and Mozart.

I would say...

Haydn
Chopin
Paganini
Mozart
beats me