Who wrote the most #1 hit singles after paul McCartney and Lennon?

Related questions

1. What is the meaning behind the Beatles song come together?
2. Do cultures mix?
3. What is a point of convergence?
4. What is the word for two opposites coming together?
5. What are juju eyeballs?
6. Did paul McCartney know to read music?
7. How Yoko broke up the Beatles?
8. What is it called when you say something but mean the opposite?
9. Did paul McCartney and John Lennon fall out?
10. Is literally a Contronym?

Tags

1. #written
2. #successful
3. #lennons
4. #lennon
5. #whereas
6. #mccartney
7. #singles
8. #songwriters
9. #credited
10. #terms
11. #number
12. #authored
13. #writer