Keoma 4K 1976

Though to be clear I wouldn't go as far as to call it "the best". Something the people involved are quick to point out or to. This is really good and you have a very charismatic (and hairy chested) Franco Nero starring. You also have supernatural elements, that may not be fully explained (not even by all the extras on the disc).

And you have old school shooutous, where bad guys seem to only need one bullet to bite the dust (literally), whereas good people have to be shot quite a few times mostly. So yes there are things that may seem or feel dated, but the overall sense is quite great. Not to mention the performances. Really telling and really inspired overall.