Have you watched Get Back? Without getting into what being one of the best is, I'd say its hard to watch that and not be massively impressed by Paul.He really was.
Hands up. I was never a fan of the Beatles. Massively over rated in my opinion.
And apart from song writing, thought Paul was the weakest.
His voice was and still is incredibly weak. Most of the sound here was from very good backing singers.
Ok. Lots like him.
But in terms of musical abilities, he is not one of the best.