If you are into the post-apocalypse genre of fantasy at all, find the "Horseclans" novels by Robert Adams.
Classic High Fantasy would be ER Eddison: "The Worm Ouroboros" (1922) and the Zimiamvia Trilogy - "Mistress of Mistresses," "A Fish Dinner in Memison" and "The Mezentian Gate."
The "Fafhrd and the Gray Mouser" stories by Fritz Lieber for "Low" fantasy, and (of course) the worrks of Robert E Howard.
Travel to alternate worlds? "The Doomfarers of Coramonde" and "The Starfollowers of Coramonde" by Brian Daley.
The "Dragonrider" novels by Anne McCaffrey, The "Deryni" novels by Kathryn Kurtz...any number of novels revolving around the Arthurian mythos...
Lots of good stuff to read within the big tent of fantasy: L Sprague de Camp, Poul Anderson, Joy Chant, John Dalmas, Lynn Abbey, L Frank Baum, Roger Zelazny, TH White...
(BTW, all the above are in my personal library)