Bateman was just someone to avoid because he was such an arsehole, you only get to find out he's a nutter when you get back to his place and compare business cards.
Travis is the sort of unhinged ex soldier type where you feel slightly uncomfortable around because you don't know what may set him off, be it driving a Prius or reading the wrong sort of newspaper.
Lector though, you KNOW to be scared off because he's such a dangerous person because he thinks that whatever he's done is normal, and if you aren't terrified of that then you are just another potential victim.
On the other hand, this subject is asking about the scariest performances so each to their own, so I'm going to vote for Freddy Kruger
