The way I see it, without Buddy Holly there wouldn't have been a Beatles, or at the very least, there'd have been a profoundly different Beatles. For example, would John Lennon have so confidently worn glasses from 1967 onwards if it weren't for Buddy Holly? Would they have written "Love Me Do" or "Please, Please Me" or "She Loves You"?? Would Lennon have thought of "Beatles"???
"Peggy Sue" (1957, went to #3)