Impossible I know, but would like to see your 6 Jazz immortals. I have gone for these.
Duke Ellington.
Thelonious Monk.
Modern Jazz Quartet (John Lewis)
John Coltrane.
Charlie Parker.
Miles Davis.
Even As I write this, I could comfortably add another 25 artists.
Can't really argue with that, to be honest. A few others that come to mind are Stan Getz, John McLaughlin, Wayne Shorter, Herbie Hancock, Milt Jackson--okay, yeah, i agree, it's easy to think of an additional 25 or so. We haven't even touched the bassists or drummers.