A couple of my favourites have been picked already, Rockwell, Adjani, Seymour-Hoffman so I’m gonna go with my favourite film, so Song Kang-Ho in Memories of Murder
As with a lot of South Korean cinema, it doesn’t rest on one tone, so Kang-Ho gets to do: arogant doofus, cocky idiot, put upon worker, ignorant lover, drunk fool, concerned detective, and so on, and so on. It’s a really standout performance, from South Korea’s most recognisable actor.
I’ll back that up with a twofer of Michael Shannon and Jessica Chastain in Take Shelter, which is not only an amazing film, but they bounce of each other so well. It’s also has one particular scene with Shannon in that breaks my heart every time.