This is going to get me put on a watchlist...
- Six String Samurai: The boy
- A Boy and His Dog: The boy
- Time Bandits: The boy
- Brazil: Robert De Niro
- The World of Kanako: This would be an unhinged fever dream no matter who is picked. I'd like to propose Ogata for shock value in a particular scene, but I think either Kanako or the main character detective overall work better
- The entire Saw franchise: Jigsaw
- SLC Punk: Heroin Bob
- Tokyo Gore Police: Key Man
- Hook: Everyone in the real world is human, everyone but hook in Neverland is a muppet, and Robin Williams starts human but by the end is a muppet
- Les Mis: Javert
- X: The old woman
- Swiss Army Man: Daniel Radcliffe or Paul Dani could work here but I prefer the dead body
- Any zombie movie but people start human and turn to muppets when bit. I nominate - - - Train to Busan
- Audition (1999): The main character