Since we are talking about the best 'offesive' fighter, no doubt it's pac. But let me continue a bit. The best 'defensive' would be PBF, Calderon, and Guzman - the so-called 'slick' fighters. The most balanced would be JMM, of course. The best of them all - anyone, whatever the style, who gets his job done against the best opponents out there; take you picks.