give us a sense of how he shaped the popular genres in his fiction, as well how his symbolist poetry influenced later poets.
To answer part of your question since room does not permit otherwise, such writers as Stephen King and Anne Rice owe much to Edgar Allan Poe who created the horror/terror genre, a genre that is one of the most popular of film genres. From Poe's writings the flourishing of the Gothic genre has brought readers stories such as Ambrose Bierce's "The Damned Thing," and Charlotte Perkins Gilman's "The Yellow Wallpaper."
The obsessive character and the element of the supernatural in the Anti-Romantic Movement have been nourished by Poe's influence, as well. Herman Melville's Captain Ahab and his quest to "break-through the pasteboard masks" in an effort to understand what is beyond Nature is an example. In a more modern work, Julio Cortazar's story, "A HouseTaken Over" is evidence of a profound influence by Poe as the main character is obviously obsessed with an idea of supernatural influence in his house. The singleness of idea and effect in this story is clearly one of Poe's most significant elements in both his narratives and poetry. The singleness and terror of effect were also used in the psychological novel of Henry James.
Certainly, with his writings of the Gothic South, William Faulkner was influenced by Poe. In turn, Toni Morrison, affected greatly by the writings of Faulkner, created "A Song of Solomon," a novel of magical realism, another genre sprouted from the roots of Edgar Allan Poe.