Tolkien and Howard are certainly up there (and I think Howard's otherworldly stuff in Conan is more apropos to a lot of D&D than the direct Lovecraft stuff).
I'm a huge fan of Glen Cook for the Black Company, Dread Empire, and Garrett Chronicles. (I thought it was neat that Gygax listed Black Company as one of the two sets of books he might add to the 1e DMG list
http://www.enworld.org/forum/showth...t-XIII/page2&p=3447702&viewfull=1#post3447702 ). I'm still undecided on Cook's Instrumentalities of the Night series - I really liked the first book but the next two progressively less so. I'm getting ready to reread them before the next volume comes out in a month or so.
Lately though I've started picking up anthologies, and they seem to evoke _a lot_ more of D&D per page than any novel I've ever read. I thought the three I got this past year were all outstanding. (I picked them up for the Glen Cook stories, but I liked the ones he's had in his own two short story collections significantly more than his contributions to these three anthologies). They were:
Swords & Dark Magic: The New Sword and Sorcery
Fearsome Journeys: The New Solaris Book of Fantasy
Songs of the Dying Earth: Stories in Honor of Jack Vance
So for books:
1) Tolkien's Middle Earth (Epic Fantasy)
2) Howard's Conan (Sword and Sorcery)
3) Cook's Dread Empire, Garrett Chronicles, and Black Company (Political, Gritty, and City Adventures)
4-5) A huge bunch of short stories to pick from.
I don't have any movies or songs that jump right out at me. (Some details in a lot of Disney movies always get me, but not enough to list them here).