Here are some more selected MOCs from the qualifying round of the Middle Earth LEGO Olympics focused on the Two Towers and Return of the King.
Jackson Williams made a great rendition of Meduseld. Be sure to follow the link, as there is no one photo that shows all of the great details of this MOC.
If you're going to do a Rohan MOC, almost everyone is going to go with the Battle of Helm's Deep, or if not that the hall of Meduseld. I really appreciate that Josh Walters went for the non-obvious with Simbelmynë. Ever has it grown on the tombs of my forebearers.
Martin Geistefeldt went for the obscure, with Haleth, Son Of Háma, a boy created by Jackson at Helm's Deep.
Grant Davis gives us a Jacksonian scene, Lighting the Beacons.
Chris Stone's Do you remember, Mister Frodo? is quite evocative.
Lee Muzzy showed us the climactic confrontation in Mount Doom.