I'm rollin wit Cus D' Amato due to the fact that he built many of his champions from scratch and it was no fluke because he has more than one (Floyd,Tyson) to name a few who also just also happen to be the two youngest heavyweight champions in boxing history thanks to Cus.
Trained 4 out of the 5 guys who beat Ali- Futch
Taught Freddie Roach everything he knew- Futch
Correctly predicted that Vernon Forrest would be the only guy who would handle Sugar Shane back when he was unbeatable- Futch
If that's not enough, his Riddick Bowe beats D'Amato's Patterson AND Tyson... And we just went through how many times he beat Dundee in a head-to-head... Even Roach himself says Futch was the best.
I'd have to agree with Eddie Futch. He even taught my favorite trainer, the Late George Benton who passed away last September from pneumonia, but in my opinion was responsible for the genius of Pernell Whitaker and had Meldrick Taylor seconds away from immortality.