Unfortunatley, here is one of my favorite characters in any media.
Billy Lenz, from the 1974 slasher film 'Black Christmas'
I have seen this movie ... a lot ... and Billy's character is very interesting
to analyze 
I've actually once made a 7 page google doc psycho-analysing the creep and 
threw it at my friends on Easter day after spending hours writing it until midnight.
So It is a bit of an understatement to say that I like this character...
I'll spare you the essay but I recommend this movie 100% + the Nick Mancuso commentary

 
he

 "It's meeeee , Billyyyy"