I'm surprised there weren't more RE characters on that list.. To me, the scariest would have to be Lisa Trevor. The way she just slowly moves along, advances towards you, without being harmed by weapons... it's just creepy. She looks frighteningly awful too, I mean, sticking you own dead mother's face to your own and wearing it like a mask... :o Come on, that's just horrifyingly sick.

http://residentevil.wikia.com/wiki/Lisa_Trevor 

That shit was scary. I played it in the arcade and it took me like $10 worth of tolkens to beat it, but it made me laugh in the end when he decides to play it again.

Its funny, I knew that would be the #1 before I even got there, I remember when I first got RE4 and went into the house to trigger the cutscene with the chainsaws. It was dark and so early on in the game that it caught my by complete suprise... then i got my head chopped off.

Well the number one is correct.. Scared the hell out of me everytime when you could hear the sound of that Chainsaw but you didn't see him.. Reloaded my shotgun just in case he would popup behind me..

List fails. Where is FFIV's Kefka?

...or anything from Eternal darkness