+3
In chronological order:
Dante's Inferno (Liguoro, Bertolini, Padovan, 1911)
Bicycle thieves (Vittorio de Sica, 1948)
La terra trema (Luchino Visconti, 1948)
Bellissima (Luchino Visconti, 1951)
Miracle in Milan (Vittorio de Sica, 1951)
Umberto D. (Vittorio de Sica, 1952)
Nights of Cabiria (Federico Fellini, 1957)
The Great War (Mario Monicelli, 1959)
The adventure (Michelangelo Antonioni, 1960)
Il posto (Ermanno Olmi, 1961)
Il sorpasso (Dino Risi, 1962)
Mamma Roma (Pier Paolo Pasolini, 1962)
The success (Mauro Morassi & Dino Risi, 1963)
A fistful of dollars (Sergio Leone, 1964)
For a few dollars more (Sergio Leone, 1965)
Almost a man (Vittorio de Seta, 1966)
The good, the bad and the ugly (Sergio Leone, 1966)
Once upon a time in the West (Sergio Leone, 1968)
Investigation on a citizen above suspicion (Elio Petri, 1970)
Suspiria (Dario Argento, 1977)
The consequences of love (Paolo Sorrentino, 2004)
A solid filmography so far, yet not thoroughly explored at all. I haven't watched any of the post-Neorealist Fellinis, or Visconti's work beyond the ones I list here (same with Antonioni), or most giallo, 80s-90s, many important authors I still haven't tried (Ettore Scola being probably the most relevant). This thread is quite nice to get recommendations.
Oh, and de Sica > Rossellini. Let's have some fun.