[Hookbill the Goomba]

What about;

Terry Jones (Of Monty Python fame) - Frodo
Michael Palin (Of Monty Python fame) - Sam
Chris Barrie (Of Red Dwarf fame) - Pippin
Craig Charles (Of Red Dwarf fame) - Merry
Bill Bailey (Of Black Books fame) - Gandaf
John Cleese (Of Monty Python fame) - Aragorn
Vic Reeves (Legend) - Legolas
Bob Mortimer (Legend) - Gimli
Dylan Moran (Of Black Books fame) - Boromir

Tom Baker (Of Doctor Who fame) - Elrond
Norman Lovett (Of Red Dward Fame) - Haldir
Danny John-Jules (Of Red Dwarf fame) - Saruman
Arnold Schwarzenegger (Legend) - Sauron
Jean-Claude Van Damme (legend) - Worm toung
Uma Thurman (of Kill Bill fame) - Eyowin
Chloë Annett (Of Red Dwarf fame) - Galadirel
Peter Davison (Of Doctor Who fame) - Theoden

Right I think that's almost every cult TV and Film that I'm interested in accounted for there.