Sure I will forget a bunch but here goes - Ellington, Basie, Maynard, Herman, Kenton, Jacquet, Ra, Mulligan, Toshiko/Tabakin, Gil, George Russell, Hampton, AACM, Machito AND (bands we assembled for the Chicago fest) Benny Carter, Benny Goodman, Roy Eldridge, Earl Hines and a wonderful Monk BB with Mal Waldron on piano.
Some of these I heard a number of times - Ellington around 20 times.