Nasser at his best had a huge back. He just didn't have the detail of yates, wheeler, ray etc. Worst back ever is crazy. His back was huge. There a reclips of him posing on you tube, huge back, just not detailed. Later in his career it got worse but at his peak he had no where near the worst back considering his mass and huge lats when hitting front double biceps.
Dilet's was poor but only because the rest of him was top notch.
Aaron Madron had a poorly developed back for his size.
The Doc