Any story by Thundamoo is great in that regard. I'm not going to describe them in case you want to read them since it would be a lot of spoilers.
Newly Summoned Demoness has a pretty interesting setting, with a huge part of the world underground and no classic fantasy monsters, despite having pretty classic demons and holy bastards.
Lost Souls and a Succubus is quite similar in many aspects, though I can't say much because it's only just started. It's also got an interesting take on a system (though it's not explicitly called that in the story, it's got many similarities to system apocalypse stories, het it's done in a different way).
And speaking of system apocalypse, The Forerunner Initiative is probably one of the best stories I know in that regard, if only because it does it in a very realistic manner. It's also got four-armed felines.
I'm pretty sure all of them are on RR, not sure about other sites.
On Scribble, there is one I can recommend, The Hopping Celestial Fox, though it's not fantasy in the way a typical fantasy is, just put in another world. It's a very unique story, as are other stories by BottledChaos, and I'm honestly not even sure how I'm supposed to describe it without major spoilers. But, yeah, it's unique enough I've not seen another similar story.
