The world's most famous composer is, arguably, not a person, but the duo of John Lennon and Paul McCartney. The Lennon-McCartney songwriting credit line spans about 180 songs, per Express, most of which for The Beatles, also known as the best-selling act in music history, according to Business Insider. This level of success has forever cemented Lennon, McCartney, George Harrison, and Ringo Starr as icons, but it also caused a significant rift between the famous bandmates and friends.
The Beatles disbanded in 1970 after nearly a decade together; a highly publicized breakup that dragged for four years amid legal disputes and that prompted fans everywhere to search for a responsible party. Between McCartney's announcement via a press release that he was leaving the band in April 1970 and Lennon's assassination on December 8, 1980, the two music legends experienced a series of ups and downs.
Source: Manuella Libardi/nickiswift.com