Debates and justifications are cool, but after the lists not within the same post.
Here's mine, given this type of thing is mercurial but this is a pretty strong list.
1.) Apocalypse - The X men comic books
2.) Magua- The Last of the Mohicans
3.) Bill the Butcher- Gangs of New York
4.)Al Swearengen- Deadwood
5.)Baba Yaga- Hellboy comics
6.)Maleficent- Disney's Sleeping Beauty
7.)Dark Sied- DC cosmic comics
8.)The Chandrian- The Kingkiller Chronicle " Name of the Wlnd"
9.)Fenris the feared- The First Law Trilogy
10.) Stringer Bell- The Wire