Paul McCartney
Paul McCartney's musical journey began when he crossed paths with John Lennon at 15 and was soon invited to join Lennon's band, the Quarrymen. They later welcomed McCartney's schoolmate George Harrison and became The Beatles.
Without delving into Beatlemania, it's clear that McCartney played a significant role in the band's success. Following the group's breakup, McCartney embarked on an immensely successful solo career.