Ever since he charged in with Gandalf beside him to lift the siege of Helms Deep in the nick of time, I have had a soft spot for old Erkies. Sadly missing from the movies, he has been recreated by GW with his famous red shield, but otherwise looking pretty much like a Rohan Royal Guardsman.
Although Erkenbrand's riders are perhaps not the best use of points in WOTR, I didn't feel my army was quite right without him. Here he is painted up and with his Rohirrim:
Would like to upgrade the banner bearer, but it is down the list of priorities right now.