Here in South America the best is Amílcar Brusa.....Deserves a mention...HOF http://www.ibhof.com/pages/about/inductees/nonparticipant/brusa.html
I think this is a good list, when based on the Resume of the trainers, which i think is the most fair/obvious way to rank them. Freddie Roach should be top 10. I wonder where Tommy Brooks & Richie Giachetti would rank on an expanded list? The rankings may be a bit different if based on more subjective criteria like; quality of corner advice, ability to motivate fighters to train hard, technique knowledge etc.