Initially thought you may have meant revisionist as a slight, but I see that it's a sub-genre. For anyone else unfamiliar (from wikipedia):

> The revisionist Western is a sub-genre of the Western fiction. Called a post-classical variation of the traditional Western, the revisionist subverts the myth and romance of the traditional by means of character development and realism to present a less simplistic view of life in the "Old West". While the traditional Western always embodies a clear boundary between good and evil, the revisionist Western does not.