The scariest LotR character

[Feanor of the Peredhil]

Just as a warning- I'm new to this forum, so I don't exactly know what I'm doing. I think that the scariest character in the movie has got to be Galadriel. For heaven's sake- she turned blue and aquired a voice not dissimilar to The Rock! In the books, however, I'm torn between the Witch King (does he actually have a real name?) and Ghan-buri-Ghan (you just don't know enough about him and his people for comfort, and the whole "the winds are changing" thing was pretty cool.) I'm also confused as to where people are getting Denathor from. Has anyone actually seen him yet?