Let's put it this way, if the Olympia was NOT fixed, it would not be the olympia, it would lose it's presitge and be just like any other show.
By my estimation Dorian deserved 2 of his wins (92, 93) and Ronnie deserved 5 (98, 99, 00, 03, 04, 05).
However, Ronnie earned more of his wins due to shitty competition (e.g. 01, 02, 04, 05). Imagine if a 2001 or 2002 version of ronnie had to compete with a '95 version of Levrone.