Gatti, for pure action. I know it's ****ed up to watch a dead man get his ass beat like that, but Floyd was BOMB in that fight. In terms of a boxing clinic, it kills me,but I'll say Marquez. Absolutely masterful.
To me I find all his fights exciting. Pure skill.
But off the top of my head; I'd say Corrales, Gatti, Hernandez, Chavez, Ndou, Corley, Judah, and Oscar.
But yeah, for me you can throw all of his fights on the list.