Jones, too many superior attributes. Hagler was a very good boxer but what made him special was his combination of chin, willpower and sheer physical toughness. Against a guy who could go 12 rounds with a decent HW, that wouldn't help. I don't see anyone on Hagler's resume that Jones wouldn't beat. On the other hand, Hagler would have a very difficult time with a slick 6'2 boxer like Hill and he would be mauled to death by Ruiz.