A certain singer from the west of England, had quite a reputation for singing and recording other people's songs and never crediting them to the author. Although he never actually claimed to have written them, most people assumed that he had - and many still do. The songs include "The Vicar and the Frog" by Stan Crowther and "Early one Evening" and "Hunting the Fishfinger" by Miles Wooten - all three of which are correctly attributed (except for spelling) in the DT.
Of course I'd never dream of naming him . . . . . . .