There is no way I can pick one.

There are really good recomendations here. But there are very few recomendations for films around the world, while I like American films a lot I'm going with my favorites from other countries.

• Korea

  • Memories of a Murder (2003)
  • The Handmaiden (2016)
  • A Taxi Driver (2017)
  • My sassy Girl (2001)
  • Ajeossi (2010)
  • Whatever Chan-wook Park did, especilly the vengeance trilogy

• Hong Kong

  • Comrades almost a love story (1996)
  • Infernal Affairs (2002)
  • In the mood for love (2000)
  • Exiled (2006)
  • Fallen Angels (1995)
  • A better Tomorrow (1986)

• Japan

  • Seppuku (1962)
  • All the old Zatoichi films (epecially the ones directed by Kimiyoshi Yasuda)
  • Hana-bi (1997)
  • Perfect Blue (1997)
  • Rashomon (1950)
  • Of course Seven Samurais, Yojimbo (everything Kurosawa made), GITS, Ghibli, etc....

• Italy

  • Sergio Leone, everyhting
  • Cinema Paradiso (1988)
  • Suburra (2015)

• Spain

  • La Isla minima (2014)
  • Que Dios nos perdone (2016)
  • As bestas (2022)
  • El milagro de P. Tinto (1998)

• Argentina

  • Relatos Salvajes (2014)
  • El secreto de sus ojos (2009)
  • Un oso rojo (2002)
  • 9 Reinas (2000)

I'm going to stop here, there are a lot of countries I didn't mention, this comment is already long enough. Don't stop yourself because the film is in another language, there are fantastic films out there.