This. You might have never read or seen LotR, but your idea of medieval fantasy is essentially LotR, I love a quote by Terry Pratchett:

J.R.R. Tolkien has become a sort of mountain, appearing in all subsequent fantasy in the way that Mt. Fuji appears so often in Japanese prints. Sometimes it’s big and up close. Sometimes it’s a shape on the horizon. Sometimes it’s not there at all, which means that the artist either has made a deliberate decision against the mountain, which is interesting in itself, or is in fact standing on Mt. Fuji.

GNU Terry Pratchett

It's a foundational work, but I'd argue that modern fantasy is more of a synthesis of LOTR and Conan the Barbarian.