the straight sax is a sporano, the highest regular type. Others include alto - the next down - Cahrlie Parker, Cannonball Adderly, and Candy Dulfer, the girl Chris is thinking of. (She's either Dutch or German, I think the former).
There are tons of great sax players to steal good stuff from. Gene Ammons is one. But for a sensuous notebender par excellence, try Johnny Hodges from the Duke Ellingotn band. He could make the alto sound so *sexy*. The band featured a lot of other great instrumentalists, all of whom could teach harps players a thing or two. More on this another time.
Lester Young was the most important jazz voice between Louis Armstrong and Charlie Parker. he was the star solist with the Count basie Bans in the '30s, and also played many of Billie Holidays' greatest sides. Check out his 1942 "D.B. Blues," and his Basie recordings of "Tickle Toe" and "Dickie's Dream." His "cool" style spawned not only bebop in the '40s and the Miles Davis cool modal style of the '50s (along with Stan Getz and several other tenor sax players), but also provided the inspiration for such R&B sax honkers as Big Jay McNeely, who has recorded with harp player Bill Tarscia.
Louis Jordan was an alto player who fronted a jazz-flavored jump-blues group, the Tympani Five, in the 1940's, and produced such classics as "Saturday Night Fish Fry" and "Caldonia," both covered often by blues players. In fact, Jordan's style was also an inspriation to Little Walter.
There are tons more great sax players, but these are probably the most directly relavent to blues harmonica.