Hi, KohanaIto san!
Yup, I'm a medievalist and Arthurian since I was 15!!
My Arthurian book collection is huge -- 8 years ago, it was already more than 100. I gave up counting all books, but it seems that I currently have more than 300... in English, French, German, and of course Japanese.
The Red Knight you said is Sir Ironside in Malory? Or, Sir Noonday Sun in Tennyson? Maybe you mean the communist knight in Donald Barthelme's novel
One of my favourite Arthurian works is T. H. White's The Once and Future King; I especially adore the characterization of Lancelot and Galahad.
The best knight of the world, Lancelot, has ugly face, and he is always suffering from self-despite.
Galahad is pure and perfect, that's why he is hated by the most of the knights of the Round Table.