Larry McMurtry is only on the expanded list for Lonesome Dove.
And Terry Southern does not appear at all.
As much as I liked Lonesome Dove (and I did read the novel) The Last Picture Show is as good as To Kill A Mockingbird or anything by Faulkner.
Of course I am a Texas boy so I’m a bit biased in favor of novels set in Texas. Hud - by McMurtry is pretty darn good too