Leprechaun - Warwick Davis
The Leprechaun franchise is surely a weird one, but it's pretty popular. Warwick Davis plays the evil Irish leprechaun hellbent on murdering anyone he can. Since this film was released in 1993, the makeup team had to rely on makeup to bring the evil character to life. Davis also had roles in the Harry Potter and Star Wars series'.
The Tooth Fairy - Ralph Fiennes
Before he was Voldemort, Ralph Fiennes was The Tooth Fairy. Red Dragon is the prequel to Silence of the Lambs. Fiennes' transformation included fake tattoos all over his body, which had to be reapplied each day of shooting.