I'm struck by the need of entertainers to fill certain slots. Whether these slots are man-made or natural I'm not sure. Maybe it falls into the "class room structure". (Where every school class has a clown, a geek, a sporty person etc. People falling into theses roles as they are seemingly a necessity of the social system.)
Alan Carr = Larry Grayson (vacant for ages when Julian Clary proved too erratic for the job)
Chuckle Brothers = Dick And Dom (or Ant And Dec) (Are Dick and Dom related? They look similar.)
Jimmy Carr = Bob Monkhouse (Quiz shows, game shows, obsessive joke collecting...)