First, it is important to know that the Beatles were very interested in « American music », because in England, there weren’t a lot of developped talents in the music industry. For some people, without the influence of the King, the Beatles woudn’t even exist. John Lennon
said it himself : « Nothing really affected me until I heard Elvis. If there hadn't been Elvis, there would not have been the Beatles ». Paul also said, in a video in wich he covered Elvis’ « All Shook Up », that the King was responsible for giving the world the « Fab Four ».
Chuck Berry was also an idol of the Beatles. In fact, these two rock n roll legends are the ones that inspired the Beatles to do such music. The band also loved the « black people music ». In their career, the band had many inspiration because they explore all type of music and even innovated a lot of them. The biggest influence the Beatles had from what I know are :
- Elvis Presley
- Chuck Berry
- Little Richard
- Bob Dylan
- Ravi Shankar
- Carl Perkins,
- Etc
It important to know that the Beatles were different individuals too. So, they weren’t inspired by all the same people, even thought it was similar enough, and that’s why their creation in music were so great, they merged their inspirations’ music into the Beatles’ music.