Screw it let me try
A Day in the Life - seen as the bands magnum opus, no?
I Want to Hold Your Hand -
the
song to represent early Beatles and Beatlemania
Yesterday - over 2,200 covers according to Wikipedia that may count for something. Plus they named a dang Beatles movie after this (sorry Across the Universe not paying as much attention to you)
Here Comes the Sun - The most streamed Beatles song on Spotify globally and it has nearly double the streams of #2 (Yesterday)
I need to update my signature.