Chugyeogja - The Chaser:
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Other foreign films:
Belgium: De Zaak Alzheimer - Dossier K - Loft (watch this if you want to see the original instead of the upcoming Hollywood remake). All of these are 'ok' and 'watchable'
The Netherlands: De Tweeling (2002) is supposed to be quite good, haven't seen it yet though. There's also 'Wilde Mossels' (2000). Oorlogswinter (2008) is quite interesting.
France: Plenty of good movies to come from France. It starts with the Fantomas series in case you're ok with films from the silent era. Furthermore I'd recommend almost anything with Jean Gabin, especially the flicks from the poetic realism era (france 30's). Movies like La Grande Illusion (1937), Hôtel du Nord (1938), Le Quai des brumes (1938), Le Jour se lève (1939) ... are all works of art. There's more modern ones aswell ofcourse, like Le fabuleux destin d'amelie poulain, but the list would become endless if I list all of them here.
Germany: Great movies from the silent era, the great days of expressionism and caligarism. Anything by Fritz Lang/Murnau is worth watching. Modern movies: Das leben der Anderen, Goodbye Lenin, Das Experiment, Der Baader Meinhof Komplex, Buddenbrooks, Tod in Venedig (1975 this one, so not that modern), Das Boot (1981) ...
Italy: I'm a fan of Luchino Visconti, but I know these kind of movies aren't for everyone. I'd really recommend 'Il Gattopardo' (1963) though.
South-Korea: Juyuso Seubgyuksageun (Attack the gas station!) (1999). I think you'll enjoy this one
Romania: A fost sau n-a fost? (12:08 East of Bucharest) (2006). I loved this one.
Sweden/Scandinavia: I see you've listed the girl with the dragon tattoo, so I resume you've seen the complete original trilogy. There's some great early scandinavian movies by Sjöstrom, and there's ofcourse the work of Ingmar Bergman. I quite enjoyed Jalla! Jalla! (2000) so i'd recommend that one aswell.
Another enjoyable movie is 'No Man's Land' (2001). It's about the Yugoslav wars in the beginning of the nineties.
Hmmm, I was going to give a quick overview, but I should've just posted a list of movie titles since I've got way too many titles in my head. Would have been much simpler and it would've probably helped you more