Okay I'm going to recommend some highly watchable classics from different countries:

Seven Samurai (Kurusawa)

The Seventh Seal (Bergman)

Psycho (Hitchcock)

The Third Man (Reed)

La Dolce Vita (Fellini)

The Exterminating Angel (Buñuel)

Whisky Galore (Mackendrick)

Les Enfants du Paradis (Carne)

Alphaville (Goddard)

The Circle (Panahi)