Here is the Games Workshop Sauron figure which I got some time ago. I painted this using lots of layers of Citadel Blotgun Metal, Chainmail, Tin Bitz and Mithril Silver with Humrol enamels for the black cape and base. I need to finish the Elendil and Isildur figures which came with it too.
I haven't tried using him a game yet but I suspect he will need some major heroes to bring him down!