Le Cercle Rouge (The Red Circle) (1970)
Jean-Pierre Melville, the French director who took his last name from Moby Dick author Herman, hit peak with this startling jewel heist film, as Alain Delon and his band of robbers set about a Paris adventure.
A far deeper and more profound film than the genre allows room for, this works at many levels, referencing Buddhist philosophy and using many a metaphor -- all the while staying true to the style, and creating a sharp epic with a magical half-hour heist sequence. Awe-some.