Bob Dorough
Robert Lrod Dorough (December 12, 1923 – April 23, 2018) was an American bebop and cool jazz vocalist, pianist, composer, songwriter, arranger, and producer. Dorough became famous as the composer and performer of songs in the TV series Schoolhouse Rock!, as well as for his work with Miles Davis, Blossom Dearie, and others.
From Wikipedia, released under the terms of the CC-BY-SA license.