Arthur Terence Galt MacDermot (December 18, 1928 – December 17, 2018) was a Canadian-American composer, pianist and writer of musical theater. He won a Grammy Award for the song "African Waltz" in 1960. His most-successful musicals were Hair (1967; its cast album also won a Grammy) and Two Gentlemen of Verona (1971). MacDermot also composed music for film soundtracks, jazz and funk albums, and classical music, and his music has been sampled in hit hip-hop songs and albums. He is best known for his work on Hair, which produced three number-one singles in 1969: "Aquarius/Let the Sunshine In", "Good Morning Starshine", and the title song "Hair".

Source: Wikipedia (https://en.wikipedia.org/wiki/Galt_MacDermot)