First a tip to Kin Gubu, "awful" means terrible to American/English speaking people. I was startled by your mention of him concerning the '64 tour.
I heard groups "live" with McPherson, Adams and Jones. BUT Shafi Hadi is my choice for the best for Mingus. Mingus wanted the "sweetness' of Johnny Hodges with the "edge" of Bird and Hadi/Porter delivered this.
I would add "good soldier" Buddy Collette to the mix for ensemble security.
Most of you don't know this, but Herb Caro in the '40s was the guy "on the make" as the best Mingus sideman before he died. I think he'd have been "something".