Joe Raposo

Joseph Guilherme Raposo, OIH (February 8, 1937 – February 5, 1989) was an American composer, lyricist, songwriter, singer, and pianist, best known for his work on the children's television series Sesame Street, for which he wrote the theme song, as well as classic songs such as "Bein' Green", "C Is For Cookie" and "Sing" (later a #3 hit for The Carpenters). He also wrote music for television shows such as The Electric Company, Shining Time Station and the sitcoms Three's Company and The Ropers, including their theme songs. In addition to these works, Raposo also composed extensively for three Dr. Seuss TV specials in collaboration with the DePatie-Freleng Enterprises: Halloween Is Grinch Night (1977), Pontoffel Pock, Where Are You? (1980), and The Grinch Grinches the Cat in the Hat (1982).
Description above from the Wikipedia article Joe Raposo, licensed under CC-BY-SA, full list of contributors on Wikipedia.