There is no definitive answer to the question of the most famous Beatle, John Lennon's popularity declined somewhat following his marriage to Yoko Ono, who some fans blamed for the band's breakup. Paul McCartney was the other famous Beatle and following the breakup, Paul was perhaps most famous. But of course, Goerge Harrison the guitarist also has a great number of fans, one of my friends like him very much. And for Ringo Starr, many Beatles fans think that he's not as talented as the other three. But still you can have your own unique reasons to be his fan. Also the previous drum player Pete Best have his own fans.
So share your favourite Beatle and the reason you like him!