I read through all the posts twice and then I googled various authors and I came across this extremely interesting interview with Jane Yolen --
http://www.lib.rochester.edu/Camelot/intrvws/yolen.htm
Like many of you, I read Mallory ... Pyle ... T.H. White ... Cooper ... Tennyson ... Sutcliff as a child. (I think it was Sutcliff that fostered my taste for fiction set in classic Rome and Roman Britain!)
I went on to Victor Canning, Mary Stewart, Vera Chapman, Molly Cochrane & Warren Murphy, Jack Whyte ... And especially Gillian Bradshaw, whose trilogy was once my very favourite, and which I highly recommend ... But there is no end to Arthurian fiction and I got to the point where I couldn't read one more piece of it! So I still haven't read Cornwell or Bradley (although, since I've enjoyed so many of his novels, his Arthurian trilogy has gone on my To Read List).
But then I discovered Alice Borchardt ... Her werewolf books were so enjoyable that I had to read everything ... So I picked up *The Dragon Queen* and I was enthralled! Her portrayal of post-Roman Britain, her depiction of the revived Celtic tribes, her characterization of the young Guinevere and Arthur, and most especially her transit from "real" history to the Celtic otherworlds -- superb! My new favourite Arthurian author!
Since then, I picked up some of the others: I found Parke Godwin's *Beloved Exile* excellent -- but I couldn't really get into Sharan Newman's *Chessboard Queen*. *For King and Country* by Robert Asprin & Linda Evans used a SF time travel frame, went off in an interestingly different direction and turned into an alternate history! Anne McCaffrey's *Black Horses for the King* is another minor YA work, but quite entertaining. Judith Tarr's *Kingdom of the Grail* is mostly a retelling of The Song of Roland, but Merlin is a main character -- another favourite of mine! I read Jack Whyte's *Uther* right after Borchardt's *The Raven Warrior* -- I realized I just didn't like it! And Whyte was out the door!
I say "real" history because we know so very little about post-Roman Britain (we have no idea where Badon Hill was!) that any Arthurian novel, even if it eschews magic and explains everything rationally, is so much a work of the author's imagination that it IS fantasy. Camelot, Ruritania, Gondor ... they are all beyond the fields we know.