Assuming all are in their prime....

Chin= George Chuvalo
Strength= George Foreman
Jab = Larry Holmes
Right Hand= Ernie Shavers
Left Hook = Joe Frazier
Endurance= Rocky Marciano
Speed= Roy Jones Jr.
Heart= Ali
Ability to recover = Matthew Saad Mohhamed
Slickness= Pernell Whitaker
Ring Generalship= Sugar Ray Leonard
Agressiveness= Roberto Duran