Asimov as well, putting it to:
Poe 9
Asimov 5
I know Poe was one of the inventors of the detective story, but Asimov is imho a much better long-form writer. Poe had this whole philosophy of unity of effect, where he believed that the best writing could only be done so long as the length of the writing was short enough to be read in a single sitting. (Something that I vaguely recall he ignored when he wrote his own longer works, but from my American Lit class, I believe he still intended those to be read in as close to a single sitting as possible.)
Asimov on the other hand, is one of the founding fathers of "modern" Science Fiction. And THE Golden Age Sci-Fi author. But he didn't just write Sci-Fi, he wrote pure mysteries, annotated versions of Paradise Lost, a guide to the Bible and historic notes, as well as a great deal on his modern Science Fact.
And not to diss Poe, but while his stories and poems have a profound ability for creating an emotional effect, Asimov's work has a much greater effect toward inspiring thought and introspection. I've gone back and re-read several Asmiov works, while the only Poe works that I've read multiple times have been, "The Raven" and "The Tell-Tale Heart". Granted, that reflects more of my own personal taste than their literary worth, but while I might grant Poe his supremacy within his own sphere, Asimov has a much greater breadth and depth of work.
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