Again I have to correct you on a few things that you posted. Piccillo was the strongest fighter at one time, not a very long time but he was. It was in the when he merged with Kami. Trunks says it to Krillin that he heard that if Piccillo merged with Kami, that he would be Vegeta realized this which is why he gets upset about how he finally reaches a new higher level only to be surpassed again by someone else. Gohan was not stronger then Goku or Vegeta until he learned to master his powers. Just because he had the potential doesnt automatically make the strongest. Even after the Grand elder unleashed Gohans full potential, he was still not stronger then Vegeta. Vegeta sensed this and even tells Gohan. Gohan also realized that as well. It wasnt until Gohan trained in the Hyperbolic Time Chamber that he became the strongest. Another thing to think about was when Goku faught against Maijin Vegeta they were equals. Now I know what you are going to say about them not being equal because Goku could have gone SSJ3. Goku had already assended to SSJ2 in other world and then assended to SSJ3 while there. Vegeta on the other had had only assended to Ultra SSJ. It's wasnt until he became Maijin Vegeta that he became a SSJ2. So if you thinkk about it, Goku had been a SSJ2 for a few years already and mastered that form and brought that form to it's max for him, yet Maijin Vegeta was only a SSJ2 for a short while and was equal to SSJ2 Goku, who had years of practice in that form. Now give Vegeta the same amount of years to practice and max out his SSJ2 form and he would have surpassed Goku yet again. The proof is there, it's just hard to picture because if the way the Magma was done.
Also, how did you get your avatar so big? Why is mine smaller then yours?
when piccolo fuses with kami he does become stronger than them all, only when freiza was in his what 2nd form? once freiza transformed to his final form piccolo was unable to even come close to touching him, however vegeta was able to fight him, just not very effectively, and goku was the only one to actually hit him.
and yes gohan was the strongest, why do you think he and goku trained in the chamber for the years time, and when they emerged goku knew his son was vastly stronger than he was, gohan was the hybrid, and from everything i know the first hybrid is always the strongest.... never know why but thats how it is, trunks who was trained by gohan(this was when gohan never became a ssj2 and never trained by his father so he wasnt as strong) trained trunks, and when trunks went back into time, he was already a super saiyan and thus already stronger than his father. So as you can see Gohan was the strongest in the android series, he was unaware of his potential that he could have become a super saiyan easily, but he never had the confidence to know that he could. its why he defeated cell, he held back, but his friends were helping him, and when he saw them all get hurt, his rage set off the last remaining power he had and his Kamehameha defeated Cell once and for all.
and Majin Vegeta was not on par with ssj2 Goku even told Vegeta he was holding back, he knew Vegeta would destroy the planet if he knew goku was holding back all along. regardless though it was an amazing fight, which vegeta won, however, since it wasnt a natural ascension it wasnt the real ssj2, to me and this is my own personal opinion, the Majin Vegeta was just a cranked up ssj2 superior to an original ssj2, that is why he was able to defeat goku and still had enough energy to fight majin buu.
Vegeta in my personal opinion, should in a new series have the exact same power levels, and strength as goku considering vegeta is no longer a ruthless tyrant, he has come to enjoy his life on earth with his family, hopefully then they will allow vegeta to be on par with goku, and able to ascend as fast or before goku to help fight some evils, cause i get tired of seeing that they all rely on goku, i would like to see once where they have to rely on vegeta to win, and its vegeta who gets the energy from the group to save the earth.
though no one can come close to ssj4 Gogeta