I think what you’ve described is pretty much a spellcaster and if I’m thinking nature based caster, it’s Druid, not Ranger.I don't want to play a Druid. There is only 2 classes I have never played since 2014, even in a dip, and which I have no desire to play. Druid is one of them (Barbarian is the other).
Druid has nothing that I want thematically or mechanically.
Rangers are spell casters and have been spellcasters in I believe every version of D&D published by TSR/WOTC.
Also Hunter's Mark is a spell. It is disingenuous to suggest you want a Ranger less focused on spells while defending 4 class features, including a capstone, that are specifically focused on spell casting.
The fact that they made Hunter’s Mark a spell instead of an ability is kind of lame, I agree. Even if an ability is magical or supernatural in nature, making it a spell amounts to just flavorless shorthand, IMO.