The statue of liberty? Cowboys? Rodeos? Hollywood? Superhero movies? Gun shows? Harley-Davidson? McDonalds? For-profit healthcare? Putting flags on everything? Greeters in stores?
The others? Well, maybe. Most of them are not strictly limited to the US, but the US does tend to put a very unique spin on them. For-profit healthcare exists elsewhere, but medical bankruptcy might well be strictly limited to the US.
I'm willing to settle for medical bankruptcy being the most quintessentially American thing.
> Greeters in stores?
Quintessentially walmart. Can't say I've seen any other store do that.
For the purpose of Cowboy/Rodeo culture, Mexico and the US are (figuratively) the same country. That is, there was a cowboying cultural region and a border got put down the middle of it very gradually. Texans were cowboys before they were american, californians, etc.