For defense I'd say Phil Bengtson, Fritz Shurmer and Dave Hanner.
The only offensive coordinator who really stands out for me was Bob Schnelker from 1980-85. The best of the rest have pretty much been "staff guys" while the best Packers' offenses have been the creatures of and run by the head coaches: Lombardi, Infante, Holmgren, Sherman, McCarthy.
Bengtson designed and ran the Packers' defenses for 5 world championship teams in the 1960's. He's overshadowed by Lombardi and the fact that the dynasty came apart during his head coaching tenure. But there's a reason Lombardi retained him by promising he would be his successor in Green Bay and his work with the defense made him a top figure in the game at that time.
Hanner had a 30 year association with the Packers as a player, assistant coach and scout. He dc'ed for Dan Devine and Bart Starr and produced some pretty tough defenses during the 1970's. If the Packers had had a little more offense then with the defense Hanner produced the record of that decade would have been better.
Schnelker really opened up the offense when he had Lynn ****ey, James Lofton, John Jefferson, Paul Coffman and backs Eddie Lee Ivery, Gerry Ellis and Harlan Huckelby in the '80's.