A while back I acquired a bunch of custom LOTR figures. Some of these were just printed torsos (such as the printed Gondorian Ranger torsos), the rest of which I had to build from parts. Others were fully-assembled minifigures (like the Witch-King). Here they are in their full glory...
Haradrim Archer / Haradrim Chieftain / Lorien Elf (Helm's Deep) / Gothmog
Gondorian Spearman / Gondorian Swordsman / Gondorian Ranger / Faramir
Eowyn / Rohan Royal Guard / Gamling
Arwen / Celeborn / Witch-King
Rider of Rohan / Rohirrim Standard Bearer
Obviously there are a ton of custom prints and moulds here, but things like the Rohan Royal Guard, Lorien Elf and Haradrim are easily created without the need for any non-Lego pieces. Piecing them together was great fun and I think they look pretty good for what they're meant to be. The Riders of Rohan too are a fun wee combination of parts. Fully-loaded you can have a single rider equiped with the following - quiver, sword, spear, shield, cape, sheath, helmet. I think they look great, personally!
Good luck with your customisations.