You’d have a hard tracking down all the covers of Beatles songs. Just looking at “Yesterday,” you’d count into the thousands. Everyone from Frank Sinatra to Joan Baez took a stab at that classic, penned by Paul McCartney and attributed to Paul and John Lennon (i.e., Lennon-McCartney).
But if you want to look at the number of successful Beatles covers, the list is shorter. Obviously, Lennon and McCartney wrote their music with themselves in mind as the vocalists, so you needed guts to cover a track like “Strawberry Fields Forever” or “Come Together.”
In fact, for all the thousands of interpretations of Lennon-McCartney songs, only two ever made it to No. 1 on the Billboard pop charts. And of those two, only one was a track the Fab Four recorded for one of the group’s studio albums.
Source: cheatsheet.com