Stupid Character Concept: Iron Monk
Start with the monk class. Take the sunder feats. Optimise the character for his sundering weapons. Now take him in to the heart of combat but don't attack. Instead, always ready an action to sunder the weapon of anyone who attacks you.
As monks can attack using any part of their body, what essentially happens is that you end up standing still as opponents break their weapons over you. It doesn't matter what weapon they use or where they hit you, the weapon will shatter when it strikes the Iron Monk.