Which former beatle had most number 1 hits?

As solo artists both former Beatles were responsible for the following hits in either the US or UK charts:

Paul McCartney:

1971 - Uncle Albert/Admiral Halsey - US No1

1973 - My Love - US No 1

1974 - Band on the Run - US No 1

1975 - Listen to What the Man Said - US No 1

1976 - Silly Love Songs - US No 1

1977 - Mull of Kintyre - UK No 1

1978 - With a Little Luck - US No1

1980 - Coming Up - US No1

1982 - Ebony and Ivory (with Stevie Wonder) US & UK No 1

1983 - Say Say Say - (with Michael Jackson) Us No 1

1983 - Pipes of Peace UK No 1

The following McCartney songs entered either (or both) the US or UK top 10:

1971 - Another Day

1973 - Live and Let Die

1973 - Jet

1976 - Let 'Em In

1977 - Maybe I'm Amazed (US only)

1979 - Goodnight Tonight

1979 - Wonderful Christmastime (UK only)

1980 - Waterfalls (UK only)

1982 - The Girl Is Mine (with Michael Jackson)

1984 - No more Lonely Nights

1984 - We All Stand Together (UK only)

1987 - Once Upon A Long Ago (UK only)

John Lennon:

1980 - (Just Like) Starting Over (US & UK No1)

1980 - Imagine released in 1971 (US No1)

1980 - Woman (US No 1)

Lennon also had the following songs in either or both the US or UK top 10:

1969 - Give Peace a Chance (UK only)

1970 - Instant Karma! (We All Shine On)

1971 - Imagine

1971 - Power to the People (UK only)

1972 - Happy Xmas (War Is Over) (UK only)

1975 - Imagine (UK only)

1984 - Nobody Told Me

1999 - Imagine (UK only)

McCartney is considered the most successful songwriter in the history of popular music.

Lennon is ranked as the second most successful songwriter in singles chart history after McCartney