That would be a really bad idea.In first edition Druid was a cleric subclass. So renaming it Nature Priest or Wild priest is a valid choice.
I expect Gygax's was too. You can do Getafix/Panoramix type characters in D&D.My introduction to druids was Asterix.
Then I think your concept of generic fantasy is way way too narrow. Characters from Merlin to Radagast all fit the D&D druid archetype.'m getting that nerd reaction where I read something that doesn't fit my concept of generic fantasy
But seer implies a focus on divination. I don't see how that is any more neutral than druid.A slightly neutral term is "Seer".
It can connote shaman, prophet, psychic, and so on.
Besides the fact that the Druid class includes divination (Commune with Nature, etcetera), a Seer implies a relationship between the Seer and target sought.But seer implies a focus on divination. I don't see how that is any more neutral than druid.
A sorcerer is a wizard without a hat.Really, the class with the "wrong" name is wizard. Even without the etymology, it carries the connotations of "wise person" - here comes the wizard, Gandalf the Wise. Originally, this class was called Magic User and wasn't renamed Wizard until 2nd edition.
So, if you really want to be pedantic about class names, I suggest renaming wizards to sorcerers, druids to wizards, and sorcerers to mutants.
A wizard is a sorcerer with a hat and a degree that isn't worth the student debt any more.A sorcerer is a wizard without a hat.