I agree to the following actors of your list:
Harry Potter: Sean Biggerstaff (Oliver Wood), Jamie Waylett (Crabbe), Joshus Herdman (Goyle)
Lord of the Rings: Sean Bean (Boromir), Craig Parker (Haldir), Ian Holm (Bilbo)
Back to the Future: Thomas F Wilson (Biff Tannen)
Star Wars: Frank Oz (Yoda)
The Rocky Horror Picture Show: Tim Curry (Frank)
The Simpsons: Dan Castellaneta (Homer), Nancy Cartwright (Bart)
Breakfast Club: Judd Nelson (John Bender), Molly Ringwald (Claire Standish), Ally Sheedy (Allison Reynolds)
The Mummy/Mummy Returns: John Hannah (Jonathan Carnahan), Patricia Velazquez (Anck Su Namun)