The Invisible Man
Interestingly enough, there was no green suit CGI actor behind the Invisible Man in the movie of the same name. The antagonist was put in entirely in post-production. Elisabeth Moss plays the protagonist who's stalked by a ghost-like man after her ex-boyfriend commits suicide.
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'.