I can easily think of plenty of Westerns superior to
Unforgiven: The Man Who Shot Liberty Valance,
Rio Bravo, The Wild Bunch, Stagecoach
(1939), High Noon, The Good, The Bad, and The
Ugly, etc. The Magnificent Seven is pretty good,
Wlady, but I have trouble watching it without comparing it
unfavorably to The Seven Samurai.
Then there are the genre-benders: Bring Me the Head of
Alfredo Garcia seems to be a period piece for the first 10
minutes or so, until the vehicles appear and you realize we're in
the present day (well, in 1974, but you get the point). William
Keisling includes Star Wars on his
list, and there's certainly a case to be made for it.