A Few Underrated Directors

This is a short list of directors who I think are terrible overlooked and underrated, hopefully it will get any of you that read this interested in these directors.
I don't just mean they are overlooked by the general public, that goes without saying, but also by many film buffs.

So here we have it, Three Frenchmen, Two Britons and One American, all great directors, and all too overlooked: