Out of that top 50 greatest list, I highly recommend ya check out:
Persona (1966)
http://www.imdb.com/title/tt0060827/?ref_=fn_al_tt_1
Stalker (1979)
http://www.imdb.com/title/tt0079944/?ref_=nv_sr_1
Andrei Rublev (1966)
http://www.imdb.com/title/tt0060107/?ref_=fn_al_tt_1
Seven Samurai...