What contributions did Edgar Allan Poe make in his era of writing?

well, he was a poet
Poe is credited for being the master and father of modern Horror and suspense. He influenced many authors; such as Stephen King. His stories also have great morals like in "Mask of the Red Death" by EAP when all the rich and powerful people die. The moral is that nobody can escape death regardless of social class or riches and that death is blind.