The Raven
From Wiki
For many years I held this to be the greatest work of art of all time in all mediums while knowing that such a title is an impossible exaggeration. However my high opinion of this poem still stands and was what turned me on to Edgar Allan Poe's genius.
The internal rhyme and infernal rhythm of Poe's alliterative poem combined with his effective use of imagery and superb use of language make this dark poem my favorite.