Don Durito
Hero
The issue is that D&D has no setting.Well now rangers are seen as
- Protecting civilization from nature
- Protecting nature from civilization
- Protecting natural civilization from urban or rural civilization
- Protecting fey civilization from nonfey civilization
- Protecting non fey civilization from fey
- Protecting civilization from barbarians
- Protecting barbarians from civilization
- Protecting the king's or lords land
- Protecting themselves and their family.
- Protection civilization from demons
- Protection civilization from lone monsters
- Everything in between
If you're setting has a wilderness area that is inherently corrupted, perhaps by an ancient evil civilisation that was once there, and needs a group of guardians on the border who also travel within that wilderness to keep an eye on it and to ensure the evil never rises again, you have your classic Ranger archetype with parallels from the Lord of the Rings and Song of Ice and Fire.
Of course just having such an organisation in your setting isn't enough, because setting less class design means that the core Ranger class is not a particularly good fit.
I feel like the Ranger is actually a pretty appealing and powerful fantasy archetype - it's that it doesn't really make a lot of sense in isolation from a setting with a place for them. Once you move the Ranger from setting element to rules element it quickly loses a clear identity.