While the 'WitchKingdom' of Angmar had been destroyed over 1000 years before LoTR, I'd reckon that there were still orcs, wolves and possibly trolls around the Angmar area.
In the Hobbit, the capitol of the orcs of the Misty Mountains is given as Mount Gundabad, which happens to be right on the eastern edge of old Angmar. Although the orcs were weakened by the Battle of Five armies, I'd imagine that they would have recovered by the time of the War of the Ring. Perhaps they contributed to the attacks on Dale and Erebor and the fighting in Mirkwood?
I've always reckoned that Mount Gram (home of the orc chief Golfimbul) must have been in the Angmar area too.
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Rumil of Coedhirion
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