Scariest characters in literature

In honor of Halloween, check out this list at Abebooks of the 10 scariest characters in literature.
Only one (the last one) is from a children's book.

1. Big Brother from 1984 by George Orwell
2. Hannibal Lecter from the novels by Thomas Harris
3. Pennywise the clown from It by Stephen King
4. Nurse Ratched from One Flew Over a Cuckoo’s Nest by Ken Kesey
5. Count Dracula from Bram Stoker’s novel
6. Annie Wilkes from Misery by Stephen King
7. The demon from The Exorcist by William Peter Blatty
8. Patrick Bateman from American Psycho by Bret Easton Ellis
9. Bill Sykes from Oliver Twist by Charles Dickens
10. Voldemort from the Harry Potter books by J.K. Rowling

Voldemort is only number TEN? Have they read the seventh book? I want a recount!

Incidentally, if you don't already know about it, AbeBooks is a great online resource for finding used books.