Tough call. So I'll give my top 10 that are tied and in no particular order ...
- Soundgarden
- Alice in Chains (with Layne Staley)
- Ozzy Osbourne (with Randy Rhoads)
- Pantera
- QOTSA
- Wolfgang Amadeus Mozart
- Frédéric Chopin
- Antonio Vivaldi
- Niccolò Paganini
- Johann Sebastian Bach
And my favorite piece from all is ... "St. Matthew Passion, BWV 244 - Aria: Erbarme dich, mein Gott"