Edgar Allan Poe's stories aren't so frightening nowadays, maybe they were before, but not anymore(at least I think so). And I haven't heard anything about the other authors, so I chose Stephen King.
By the way, Stephen's son Joe Hill is also a good horror author. OK, I admit, that I'm reading my first book by him, but it's amazing. :D

Sorry, but I've never liked King's work- I think he focuses too much on the horror and not enough on the humanity. Which brings me to Koontz; he would be perfect to tell the Winchester story. He can do horror fine, but he also knows that at the core of any story are characters and that's what's important. He delves into the human psyche and many of his books are about people overcoming horror and proving their humanity. They can be so uplifting. He's one of my favourite authors.

Definitely Stephen King.He is the master of horror books!

Poe, for the darkness inside.

I agree with fanfly

I'm most familiar with Stephen King and Poe, but Dean Koontz does sound like the perfect author to tell their story!

the only one i know is stephen king and he's good, maybe the other ones or better but never heard of them in my country :D

Poe, cause he is Poe!
never really read the rest of them :)

i was gonna say edgar allen poe but his stories never had happy endings so sam and dean would both end up bing sent to hell and then it would end

Stephen King because I don't know the others and "It" freaked me out when i was little.

this would be cool

i do love bradbury tho

I hate Stephen King- altho the Stand does seem to share some similarities with Supernatural. haha, including the music! ("Don't Fear the Reaper" by Blue Oyster Cult- I freakin' LOVE that song!)