[QUOTE=Terrifel]
Well, but that must have been just as true at the end of the First Age; and yet it was a powerful minion of Morgoth who ultimately proved the greatest force of evil in the two Ages to come. Since there are still powerful minions of Sauron running around unaccounted for at the beginning of the Fourth Age, it just seems natural to look first to their ranks for the next gathering threat.
Sure, mortal men will turn to evil on their own; but surely all the wights, werewolves, foul spirits, orc-chieftains and dark magicians left over in the wake of Sauron’s fall wouldn’t be content to sit idly by without trying to reweave that web of conquest and machination.
Granted, they probably wouldn’t be able to muster sorcery on as grand a scale as Sauron; but that’s to be expected given the generally entropic character of Middle-Earth. Saruman’s Orthanc seems like a reasonable projection of how such a Fourth Age Dark Lord’s kingdom might be scaled; a pale flattery of Barad-Dur, yet still formidable enough to menace the kingdoms of Men through both subtle manipulation and force of arms.
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Ellesar and Eldarion, riding with Eomer and his descendents and the Princes of Ithilien and Dol Amroth, did much after the war to cleanse Gondor and Arnor of many of the ancient evils. At least for the reign of Ellesar and Eomer, the humans and Durin-Folk worked together to eradicated many of the old goblin lairs. Without Sauron’s or Sauramen’s guidance the Orc and Goblins are ill-suited to doing anything other then harassing lost travelers. Trolls were rare and reproduce very slowly without guidance. Werewolves were already rare by the 3rd age and were rarely seen and not even mentioned in the LotR. Wargs would remain problems for a long time, but as human populations increased, their numbers would decrease like any other wolves. The lesser Dragons fully appear to be lazy and cowardly by nature and we have no clue how they reproduce. The foul-spirits are generally not mobile monster.
I agree the Mouth of Sauron and some other Black Numenoreans are your likeliest suspects to follow Sauron, however, Numenor, Gondor, Arnor and Rohan already in their history showed that much evil could be done by civil-war and kin-strife or just a few weak Kings in a row.
My use of the Ring Wraiths is a cheap trick to play to my audience. Having Ring Wraiths after the ring was destroyed was cool, not terribly logical within the framework that Tolkien provided.
I am not sure if you are considering Sauraman a minion of Sauron, but he was not. By his own greed and fall he did much harm to Rohan. However, he had the strong ambition to be the power himself. I am sure the Mouth of Sauron and the Witch King knew that there was to be no chance at moving to the top.
Jim