Charles, agree on Dexter, and "Prez" would have been on my list if it had been four instead of three. I listed three only because the OP listed three. Since he didn't say "favorite" but "greatest", "greatest" seems to imply "most influential" since anything else is subjective. I think who the most influential have been is pretty well established and agreed upon by knowledgable fans and critics. I also like Acman3's choice of Wayne Shorter, besides being a great player was one of the very best jazz composers. So, for stature and influence:
Hawkins, Prez, Trane, Sonny, and I am tempted to add Joe Henderson
For listening pleasure:
The above and I would add Dexter, Getz, Zoot Sims, Charles Lloyd, Johnny Griffin, Hank Mobley
And for sheer virtuosity (ability to do anything on the instrument from a technical standpoint), IMO the greatest ever virtuoso on the instrument has to be Michael Brecker.
Hawkins, Prez, Trane, Sonny, and I am tempted to add Joe Henderson
For listening pleasure:
The above and I would add Dexter, Getz, Zoot Sims, Charles Lloyd, Johnny Griffin, Hank Mobley
And for sheer virtuosity (ability to do anything on the instrument from a technical standpoint), IMO the greatest ever virtuoso on the instrument has to be Michael Brecker.