You know...I can't really decide. I've got respect for each and every one of them. John's voice, musical talent and personality would be great. But then again, Macca has got those as well. And then George developed his voice and songwriting talent in later days. Ringo is just Ringo..always seemed to be the care-free type of guy; and there's nothing wrong with that.
If I really had to choose, it would either between John or George. And that's as far as I can go