For many people, he's the most powerful Jedi ever.
Welp, I don't know...
He has skills, no doubt...
But he started walking the Jedi path when he was an adult.
In sport, if you won't start as a kid you have no chance to reach the top.
Especially without any doping.
Let's agree that he was the most powerful Jedi at the time he lived after order 66 executed.
Based on this pic:
https://images.app.goo.gl/SBR7StQzpw34FwMu5