In the way of fame his most important fights were:

ODLH- Because of who he was fighting!
Trinidad- Because at the time a lot of people believed Tito was invincible!
Tarver- Because it rocketed him back to the limelight after his 2 defeats to Taylor!
RJJ- Because it made both men into bigger names at the time. Just a shame it happened in 1993 and not 2000ish.
Pavlik- Again like Tarver shocked the world by schooling as the underdog.