RE: "Aurelien" by Louis Aragon, your imagination, my dear fellow, is worth more than you imagine.
Well, Edgar Allan Poe is more than gothic horror writer. Have you write Poe's novel "The Narrative of Arthur Gordon Pym of Nantucket" ? There is germ of surrealism. I think you know how much Poe influenced Charles Baudelaire and Baudelaire is of the group of the poets like Rimbaud, which are the basis of surrealism.
Interesting, from you I understand for the influence of Aleister Crowley on surrealism. I have to check for more information about that. And for me it is positive think that spiritualism and occultism are heavily rooted in surrealism. But this is a subjective preference. You know that during this period piritualism and occultism have influenced many other movement in art. Let me just mention authors outside the avant-garde like August Strindberg or Gustav Meyrink.
Ah, for J.R.R. Tolkien my opinion is the same as yours for the surrealism. :D I am modest fan of fantasy but only in the visual form :)