Oliver Postgate
In 1948 he trained as an actor at the Royal Academy of Dramatic Art, but he never became a professional actor.  He was more interested in animation.  He created the character of a pig made out of cardboard that played the violin.  The BBC were not interested in his idea.  Seven years later he joined the ITV London company Associated-Rediffusion as a stage manager.  He worked on children’s programmes and made props.