[Inziladun]

The most recent would seem to be Elladan and Elrohir. They probably would have passed through Dunland when they rode with the Dúnedain of the North to meet Aragorn in Rohan.
In fact, they were likely the first to be seen by the Dunlendings in living memory, as I can't conceive of a scenario which would bring Elves to the area prior to that. The Elves of Rivendell would have no business there; they used the High Pass and the Redhorn Gate to clear the Mountains when traveling to Lórien.