I would add some others who were contemporary, and more Manley Wade Wellman, but that's a pretty good accounting, and it even references Robert Louis Stevenson who is one of my favorites and who I have gone on about for years...
Thats quite the list. I like how it links to the actual stories. There is an Ambrose Bierce I will check out & others. Blackwood I would like to read more of
Two very fine authors. I have a soft spot for Bierce due to his excellent stories as well as his trenchant and biting satire on humanity's foibles. Clark Ashton Smith's earliest poems were read and appreciated by Bierce.
"The Willows" by Blackwood is a piece of art. His novel, "A Prisoner in Fairyland" is in a word, charming.