You have to remember that Wild Wild West was science fiction, a precursor of "Steam Punk." Everything was exaggerated in the movie.
Now I've listed a bunch of recent movies and old movies with positive Confederate/Southern characters, or told from the Southern side of the story. The only one you seem to think is "fair" is GAG because, from what I get, there are two loyal slaves in the movie.
The "PC" issue was reversed in the older movies to get white Southern "a$$es in the seats" to watch the movies.