I have to agree with others. I dislike Wormtongue... the only good thing that that guy did was kill off Saurman for good! But I just didn't like him, I even think I liked him better in the film than in the book because it just seemed like he had a larger part. But, yes, he has to be the first obscure character that I don't like that popped in to my mind. I really don't have an extreme dislike towards anyone else (in the book at least, the film is another story...)