Well the Buu Saga should have been Gohan as the hero, and while he was for a small period, it was still about Goku. Goku was dead and he was fine with that, I was fine with it, Gohan was a better fighter in some cases as opposed to Goku. Goku was too soft a lot of times, and Gohan was sort of, he was definitely more willing to end a fight than Goku was. Both enjoyed the fight and Gohan made the mistake of letting Cell self-destruct, but in the end if Gohan had not be forced into doing schooling and continued his training, he would have equal to Goku's power since he already had a head start.

Gohan would have been definitely stronger than Vegeta who could not find SSj3 and required helped to get even remotely strong enough. Goku and Gohan are clearly the strongest fighters. Though it is unfortunate that Krillin and Piccolo could not follow in their rise to power, because they all got knocked aside because their powers were too weak.