Arthurian novels

I'm looking for a novel that recounts Arthurian legends. I'm not interested in books like Bernard Cornwell's series that interprets the legends through a historical lens. I want something that really leans into the fantastical elements. I'm also not interested in Le Morte d'Arthur due to it basically being a collection of tales rather than one narrative. I want something that reads like a novel.

I have already read The Once and Future King and The Mists of Avalon.