George didnt write Please Please Me..
When it comes to showmanship, I would say Paul trumps him, George simply played guitar when The Beatles played live, usually in the centre, playing up his quiet shy stereotype. He got much better whilst playing solo afterwards, but Paul was consistently good on stage, leading the band when John wasnt, sometimes joining in with Johns clowning while George can often be seen just standing there.
Interviews is a whole different matter, George was just as bright and charismatic as the others (barring John).
I have to disagree with you on both counts of instruments and vocals. Of course opinions of vocals are opinionated, but technically Paul dominates him and John as well for that matter. His range is superior and I find more varied, while George is fine, compare Roll Over Beethoven to Oh Darling, Paul steamrolls him with two similar songs in terms of energy. Again I like Georges voice, but I just find that Paul has so much more variety, power and technical range. Of course coming from a guy looking at doing classical voice, I cant help but look at it that way mind you.
I am more hesitant to consider instruments, sure George is the better guitarist, and could play the Sitar quite nicely. But Paul was a capable guitarist, drummer, pianist, bassist, and even ventured to other instruments that George never touched, such as the Mellotron or the Trumpet. He has proved that he is quite capable at all these instruments (though I have no idea about the trumpet), and for that sheer variety that George lacks, I would give it to Paul personally. Though I will say again, George certainly is the better of the two with a guitar.