Hmm... generally, good points about Ted Sandyman (even including
Nog's treatise on the nature of Hobbit millers
). Also, the thoughts
Nog brings about the Mouth being basically defined only by his malice is close to the spot... but I don't actually think it's entirely correct. The Mouth is defined also by other things, like his proficiency in sorcery, and in fact, now that I recall, his description includes cruelty and cunning, love of dark knowledge and much more. So he is defined also by other things, and therefore Glaurung might fill the idea of malice more, just as it's been said... Hmph. In fact, ha, I was just about to write that Glaurung fits much better, but now that I recall the description of Mouth, I am not so sure anymore. Flip-flopping time
I might just choose the Mouth because I like him a bit more in some ways. Also, if the Mouth "knew much of the mind of Sauron". But.. okay, after all, Glaurung is Glaurung.
++Glaurung for Malicious