What are some old jazz artists?

I think you mean who.

Art Blakey
Charlie Parker
Art Tatum
Dexter Gordon
Oscar Peterson

Hi. To name a few, here are my favorite classics. Here are their albums that are good to start off as well. Not a speck of disappointment:

Miles Davis - "Kind of Blue" or "In a Silent Way"
Dave Brubeck - "Time Out"
Thelonious Monk - "Monk's Dream"
John Coltrane - "Blue Train"
Art Blakey - "Moanin'"

Louis Jordan
Ella Fitzgerald
Sarah Vaughn
Dinah Washington
Louis Prima
Louis Armstrong
Al Hirt
Miles Davis
Billie Holliday
Gene Krupa
Nat King Cole
Count Basie
Buddy Rich
Al Hibbler
Duke Ellington
Lionel Hampton

Scott Joplin
Louis Armstrong

Freddie Hubbard
Wayne Shorter
Oscar Peterson
Cannonball Adderley
Elvin Jones
Art Blakely
Monk
Trane
Miles
Duke
Basie
Armstrong Louis
Jimmy Smith
Ray Bryant
Max Roach
Joe Zawinul
Roy Haynes
Dexter Gordon
Pops
Horace Silver

jelly roll, the prez, mingus, satchmo, cabcal, billie, monk, bird, duke, ...the list goes on