Graham Keith Gouldman (born 10 May 1946) is an English musician. He is best known as the co-lead singer and bassist of the art rock band 10cc. He has been the band's only constant member since its formation in 1972. Before 10cc, Gouldman worked as a freelance songwriter and penned many hits for major rock and pop groups, including the Yardbirds, the Hollies, Herman's Hermits and Ohio Express.

Description above from the Wikipedia article Graham Gouldman, licensed under CC-BY-SA, full list of contributors on Wikipedia.