Hi. The Poe Toaster is actually unknown, however, there is some interesting information. From 1949 until 2009, a masked man left three red roses and a bottle of Cognac on his grave. He was never unmasked so his identity was unknown, though several people witnessed his visit(s) to the grave.
The Smithsonian website has additional information that may be useful to you as well. Hope this helps.
Take care,
Diana