Thanks for to input guys, it has given me a few things to think about. time period i am thinking of of the time of Númenór or not long after is destruction. my belief is that Rangers were not the "sneaky" rangers like we see in D&D, but were a military unit that carried on with Núme...

So given that Rangers are decedent of the Númenóreans and that Black Númenóreans exist.

would we assume that the Black Númenóreans had a separate culture and even a different version of the Rangers of Arnor?

and if so what would these rangers be like compared to their counterparts?