No, I don't think Dunsany should be forgotten, but if it's claimed that he was "One of the greatest fantasy writers of all time," as it was recently, that statement should be argued, not just asserted. Was he? What is meant by "great"? I've tried to show that using "great" when all that someone is prepared to say is that he was influential isn't (to my mind) good enough.
As you'll have seen, I have a personal stake in the discussion. When I was 15 I would have said he was one of my favorite authors. I bought the new Ballantine Adult Fantasy releases of his work as they appeared at a time when I didn't have much spending money, and ended up buying some other books of his too, some of which I didn't end up reading through. When I have revisited a few of his characteristic fantasy stories in recent years, I have found that they seem kind of tedious, not because the writing is "hard" but for reasons I've tried to suggest in earlier comments here.
A lot of us here at Chrons have reading lives that extend over five decades or more, and that fact seems to invite discussions about youthful favorites. How well do they* hold up now? Aside from associations with our youthful days, when we were first happily exploring fantasy and science fiction, what excellences do our old favorites possess -- to this day?
For myself, this is not a threatening activity, because even if some books and authors don't hold up, a number of my old-time favorites, such as Tolkien, Le Guin, Garner, Lewis, Lovecraft, &c. do still please me, and, when I exert my adult wits upon them, they yield respectable results -- if not always all of their work, then at least some of it. I might now perceive them as having accomplished far more than I did when I read them basically just for exciting stories. I've even found that some authors I liked as a kid in the mid-teens have gone up in my estimation (William Morris comes to mind; I think I like him more now than I did then).
It may be that I will try more Dunsany tales and be able to place this author in a position of enhanced respect in my personal library. I've kept almost all those Dunsany books -- all six of the Ballantine editions, the Dover selection, a leather- (or "leather"-) bound Modern Library selection from the 1920s or so, an Owlswick Press book with Tim Kirk illustrations, etc. (I did let go of the Newcastle edition of The Food of Death.) But usually I haven't found Dunsany much to my taste lately. I did think The Curse of the Wise Woman was pretty good when, having carried the book around for many years, I at last read it a while ago.
I think it was W. H. Auden who said: An author may be undeservedly forgotten, but no author is undeservedly remembered -- or something like that. But it might be possible for literary works to be "remembered," repackaged, etc., as if they deserved it, when all that's at work is just the repetition of received opinion. I think Dunsany's got more than that going for him, but I am interested in seeing discussion of the qualities in his work that make it deserve remembrance and rediscovery. "Influential" sidesteps that. I think from now on when someone says an author is great because he or she was influential, I might press the matter and say: All right, how did this author influence others? Who were influenced him him or her? Show me how that influence was a good thing, of lasting merit, not a bad or neutral influence. Show me.
Otherwise, I might suspect that, when someone says Author X was great, this might be little more but an expression of affection for one's own reading past, or a thoughtless repetition of someone else's -- or the mob's -- received wisdom. We can do better than that. : )
*Asimov, Bradbury, Brunner, Edgar Rice Burroughs, Clarke, Dunsany, Eddison, Howard, etc. might be members of this group.