"Blackwoodian" and "Machenesque" literature

[pseudonym]

I started discussing this branch of literature yesterday on goodreads (http://www.goodreads.com/topic/show/...nesque-fiction) and librarything ("Blackwoodian" and "Machenesque" literature | The Weird Tradition | LibraryThing) to pretty positive response and thought it might be worth sharing here:

I'm working on a "weird fiction"-based senior capstone project and my discussion is leaning increasingly towards the niche occupied by Blackwood, Machen, and occasionally Sarban. I find it interesting that these two (sometimes three) authors are conflated as often as they are, and would like explore their connections -- potentially in terms of the use of space and Rudolf Otto's concept of the "numinous."

I'd be interested to hear any theories on this sub-genre/niche, or any fiction/non-fiction recommendations.

Works I've read that I'd like to include:
Fiction-
The Willows & The Wendigo (Blackwood)
The White People (Machen)
The Events at Poroth Farm (T.E.D. Klein)
Primeval Wood (Richard Gavin)
Yns-Y-Plag (Quentin S Crisp)
Non-fiction-
Haunted Presence (S.L. Varnado)
Closed Space (Manuel Aguirre)
The Weird Tale & The Modern Weird Tale (Joshi)

Reading: Ringstones (Sarban)

Things I intend to read soon:
Cwm Garon (L.T.C. Rolt)
Five Degrees of Latitude (Michael Reynier)
Midnight Sun (Ramsey Campbell)

I'm also looking for an alternative to "Blackwoodian," which just isn't working for me