Of the people looking for a wilderness-style skirmisher without an animal companion, what part of Fighter isn't appealing to cover this?
Is it the ability to track while moving quicker? (Something which could easily become a feat)
Is it the Favoured Enemy Intelligence and Wisdom bonuses?
Is it the nature-based movement abilities?
I think the new Fighter has been given far more depth than previous editions and since Dex-based fighters are great you can easily re-create a stealthy fighter who only requires your DM to add Natural Tracker as a feat to give you the option!
Pretty much all of this and, well, everything else that is in the core class features in the PHB. I get it, for a lot of people, proficiency in certain skills is covering the wilderness part of the class, but please understand, that to a lot of other people (including me) the extra features the ranger gets ont the top of that base is essential. It's not perfect, I could imagine stronger, or more flexible versions, but it is OK.
The fighter's theme is fighting and it allows a lot of sub-themes, like manouvers, hitting very hard, organizing the fight and so on. I think the ranger is also a fine class, which theme is (saving people) hunting things and survival with also a lot of possibble themes, like: hunting down things like no one else, scouting-skirmishing, bonding with pets, hunting related spells etc. All of them are viable approaches as subclasses in my eyes and the sum of that absolutely deserves a full class.
In one sense, everything is everything as classes are artificial. A scout is a nature rogue? Sure, and the rogue is just an urban scout. Barbarians are just rangers focusing on fighting and tapping their inner bestial self. I think everything that is nature-hunting-fighting related is fundamentaly in the ranger "familiy". However, I'm okay with some oddities, like the nature paladin, and a possible scout-rogue. Why not? Allowing interesting concepts is always better than restricting.
As a related topic: I was a litle bit disappointed, that the bladesinger became a wizard subclass, I loved the Pathfinder MAGUS and it's archetypes but hey, the BS is good after all, so it's not a tragedy.