Over the years, I've sat through a bunch of them. For a while it was a cross-cultural exploration. I ended up being glad that I was not living in small town Alabama back in the 1930's at all, not to mention glad to not be obviously from a minority group in that universe. Some that come to mind that I recall being pretty good were - Deliverance, Walking Tall, The Sugarland Express, Rolling Thunder, Norma Rae, Wise Blood, etc.
A special place in my memory was reserved for The Legend of Boggy Creek and Return to Boggy Creek.
I'd have to wear a disguise if I were to enter a theater to see Smokey and the Bandit, in part due to the plot and in part due to having to sit through 90 minutes of New Yorker Jackie Gleason chewing the scenery, faking a not-New York accent, spewing bombast and leading with his gut.
Anybody in need of a really big but much older cultural shock can stream Birth of a Nation, the silent one from 1915 and find out how the Klan rescued southern white womanhood.
Back to the 70's, don't miss Swamp Girl or Frogs, and I seem to recall that Sounder actually got good reviews.
If you are in the need for an extensive list, check out:
https://en.wikipedia.org/wiki/List_o..._United_States