No Potemkin?

I dug most of those you named - but have never seen The First Echelon; I'll have to give that a go, as I've liked the other Kalatozov's I've watched (including those others you listed).

Tarkovsky is a God to my mind, if I did a list he'd dominate the upper portions, lol. I also really admired Larisa Shepitko as a filmmaker. And movie wise, Bondarchuck's War and Peace blew me away. Man with a Movie Camera is genius, I saw that in a theater with live accompaniment and what an incredible experience that was.
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Completed Extant Filmographies: Luis Buñuel, Federico Fellini, Satyajit Ray, Fritz Lang, Andrei Tarkovsky, Buster Keaton, Yasujirō Ozu - (for favorite directors who have passed or retired, 10 minimum)