The Mouth of Sauron

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'So!' said the Messenger. 'Then thou art the spokesman, old greybeard? Have we not heard of thee at whiles, ever hatching plots and mischief at a safe distanceBut this time thou hast stuck out thy nose too far, Master Gandalf; and thou shalt see what comes to him who sets his foolish nets before the feet of Sauron the Great.

RotK, the Black gate opens, page 192.

With that settled, i think we can agree that he was allowed to call his master by his right name. Anyway, what do we know more of this chap, him being quite a nasty fellow excepted? He was still a man, and he was still living in a very high degree. His status on Mordor then? He rose quickly die to his sourcery and went to Sauron because he was enamoured by the evil knowledge. He is said to have known much of Sauron's mind, growing ever higher in his favour due to hsi cunning. Not to mention that he was crueler than any orc, this makes him seem like the second man in Mordor, especially because he ahs got his free will left. He was an emissary, and in medieval times, those were high born nobles, a very important position, not entrusted to anybody, I would think taht he was considered above the Nazgûl who were simply doing the dirty work for their Master, looking for Rings and commanding armies. Just like Denethor said, he was a spear in Sauron's hand. He must have ahd some military importance in the Black tower since he is said to be 'lieutenant of the Black tower, probably eh was teh second in command. To make a clarification, he was responsible for the war at a strategic level while the Nazgûl ran the operational and tactical levels. Look at him as a Chief of Staff and close advisor to the Dark lord.
What pseaks for this theory is that the Lord of Angmar, A.K.A. Chief of the NazgÛls was his ablest military commander, by which I assume he means field commander, not staff officer.

What speaks for the Nazgul is a few things, chiefly uttered by their opponents. Pippin syas at the battle of the Morannon: If I just could get a blow at that ugly lieutenant I would almost keep pace with Merry's achievement." (or something to that effect) Notice the almost, speaking for their rank. Moreover, Gandalf makes some hints about their status, but all this is very vague.

What strikes me now is what otehr roles he might have played? For example, the Messenger that came to Dain seemed pretty nasty, could it possibly be the Mouth of Sauron?

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