Are the Beatles really the best Rock 'n' Roll band? Seriously? My answer is NO.
Don't get me wrong, I like the Beatles, they had some really good songs. I doubt I agree with many people about which Beatles songs are the best. My favorites?: Yesterday, Ticket to Ride, Don't Pass Me By, With a Little Help From My Friends, While My Guitar Gently Weeps. Well some of my favorites anyway.
Seriously though, what makes them the best? Honestly, I'm a bit tired of hearing 'because they're the Beatles'. That's not an answer.
While their songs are good and the vocals are great, they didn't play their instruments very well at the beginning. Yes, they got better, much better actually. But, in my opinion, I haven't found anything that would make them the best.