What about The Ronettes, Elvis, Little Richard, Johnny Cash, Roy Orbison, etc.
Agreed. Those were probably all influences -- obviously Elvis and LR were. Not so sure about JC. (Except that Dylan was influenced by him, and BD influenced the Beatles.) I guess it's mostly a matter of where one draws the line to define "contemporaries."
The Beatles also claimed to be influenced by/fans of Mary Wells and Marvin Gaye. I'm sure it all went into the mix.