I think that Charlie Parker and Lester Young would have to be on the list. I agree that Coltrane belongs on the list as well. Other candidates would include:
Ben Webster
Stan Getz
Coleman Hawkins
Johnny Hodges
Sonny Rollins
Hank Mobley
Ornette Coleman
Cannonball Adderley
Dexter Gordon
Wayne Shorter
Sonny Stitt
Of course, if you limit your list to five or ten, there are a lot of great sax players who would not make the cut, including Chu Berry, Teddy Edwards, Wardell Gray, Ike Quebec, Don Byas, Harry Carney, Sidney Bichet, Steve Lacy, Paul Desmond, Booker Ervin, Gerry Mulligan, Serge Chaloff, Warne Marsh, Eric Dolphy, Pepper Adams, Roland Kirk, Cecil Taylor, Albert Aylor, Al Cohn, Flip Phillips, Zoot Sims, Johnny Griffin, Illinois Jacquet, Gene Ammons, Sonny Criss, Arnett Cobb, Eddie "Lockjaw" Davis, Lou Donaldson, Stanley Turrentine, Jimmy Giuffre, Sam Rivers...
Ben Webster
Stan Getz
Coleman Hawkins
Johnny Hodges
Sonny Rollins
Hank Mobley
Ornette Coleman
Cannonball Adderley
Dexter Gordon
Wayne Shorter
Sonny Stitt
Of course, if you limit your list to five or ten, there are a lot of great sax players who would not make the cut, including Chu Berry, Teddy Edwards, Wardell Gray, Ike Quebec, Don Byas, Harry Carney, Sidney Bichet, Steve Lacy, Paul Desmond, Booker Ervin, Gerry Mulligan, Serge Chaloff, Warne Marsh, Eric Dolphy, Pepper Adams, Roland Kirk, Cecil Taylor, Albert Aylor, Al Cohn, Flip Phillips, Zoot Sims, Johnny Griffin, Illinois Jacquet, Gene Ammons, Sonny Criss, Arnett Cobb, Eddie "Lockjaw" Davis, Lou Donaldson, Stanley Turrentine, Jimmy Giuffre, Sam Rivers...