Stagecoach is typical of the western genre from the 30's. You have such tropes as a band of people gathered together for a common cause, Indians on the warpath, and the Cavalry coming to the rescue. Really, not much in the plot distinguishes it much from dozens of other western films of the day.
But the movie transcends those tropes, and most of that can be credited to the dynamic cast. In particular, in my mind is Thomas Mitchell as the alcoholic doctor and Claire Trevor as the woman with a past she'd just as soon leave behind.
This film is credited for saving the western film from the trash heap of low-budget poverty row oblivion. And it shows. There are some decidedly adult situations here that would have escaped the pre-teens of the 30's who were regular fans of westerns, not to mention the rather subdued hints that Dallas was a whore. (Couldn't exactly come right out and say it in the days of the Hays Code, could they?)
The fact that John Ford stuck to his guns and cast Wayne as the Ringo Kid, despite studio pressure to have him played by the likes of Gary Cooper (and just imagine how different that would have come off...) is a credit to both Ford, and to Wayne for taking the role.
Stagecoach didn't make my top 5 (mostly because I am more enamored of the grizzly older Wayne from the 60's and 70's), but I still would make it in the top 10. On Father's Day this year, a theater down the road had it for a one time only viewing. I didn't get to see it on a big screen mainly because I hate sitting on the front row and by the time I found out about it that's all that was left in seating. Maybe next time around.
Quiggy