Which of the Beatles had the most successful solo career?

Paul McCartney. He was the one who provided the spark for a lot of their projects, and was the one who wanted to perform live, when the others had grown tired of it. It was this drive that enabled him to reach the heights he did as a solo artist. He is one of the most talented singers in pop history, a great songwriter, was considered very handsome by female fans. All this together with his willingness to play for the masses, makes Paul McCartney the most successful.

#1 Hits By Single Beatles on U.S. Charts

Paul McCartney #1 Hits : Ebony And Ivory (with Stevie Wonder), Say Say Say (with Michael Jackson), Silly Love Songs, My Love, Coming Up, With A Little Luck, Band On The Run, Uncle Albert/Admiral Halsey, Listen To What The Man Said

George Harrison #1 Hits: My Sweet Lord, Got My Mind Set On You, Give Me Love (Give Me Peace On Earth

John Lennon #1 Hits: (Just Like) Starting Over, Whatever Gets You Through The Night

Ringo Starr #1 Hits : Photograph, You're Sixteen

But you can argue that John Lennon and George Harrison wrote more substantial music after going solo. They each put out complete masterpiece albums; Lennon's Plastic Ono Band (1970) and Harrison's All Things Must Pass (1970).

It's also hard to compare McCartney and Starr's solo careers to that of Lennon and Harrison, as both of their lives were tragically cut short.