Gandalf the White
One of the five Istari, bearing the Ring of Fire, Narya.
Gandalf the White was originally sent to Middle-Earth as Gandalf the Grey for the purpose of defeating Sauron, servant of Morgoth, or at least to prevent him from gaining the One Ring -- the source of all his power.
When Saruman the White, Gandalf's superior Istari, was corrupted by Sauron, Gandalf took the helm and was instated as Gandalf the White.
Known as Gandalf, Mithrandir, Stormcrow, and many other names, this wizard has lead many armies to victory many times.
But at the Great Battle of the Time - the Seige of Gondor - has Gandalf met his match?
NOTE: The leaderheads I try to get are those of the Haradrim Mumakil Riders, the Easterling, and Theoden of Rohan. But I have always wanted Gandalf, and he seems the easiest to make.
SPECS
It is not necessary to be Era-Specific, because my mod spans over the time of two or three days.
But I think some certain LotR modders would appreciate it if you made it era specific

And can I have it animated?
SECOND NOTE
Has someone else already done thsi? Because I did a search, and nobody had it in the Library.