Hi Jason! I tend to like “older” stuff.. here are a few titles (outside of LotR :) that popped into my head..
Relic by Douglas Preston and Lincoln Child. The book that started my obsession with these authors’ stories and style. They are prolific. I’d definitely recommend Relic first then going from there. Their genre bounces between techno-thriller, science fiction, and adventure.
The Once and Future King by T.H. White. One of my top 5 favorite Arthurian fantasy novels. I think I’m due for a re-read..
Madeleine L’Engle’s Time Quintet and Mary Stewart’s Merlin Trilogy. Words cannot describe my admiration of these works.
Hope at least one or two of these are new for you.. :)