The Dunedain?

[Encaitare]

I'm trying to recall if there is any mention of other rangers in the movies.
I would think a nonbook movie viewer would think he was "The Last of the
Dunedain" to paraphrase an old movie.

They're not mentioned by name or anything, but the movie-viewers would know he's not the last (if they remember one humble line from early in FotR): Butterbur says of Strider, "He's one of them Rangers," which would imply that there are more Rangers out there.