For me, its a tie between chinese warrior Zhao Yun and zombie killer Chuck Greene.
Zhao Yun - A man who wishes nothing more than peace and justice in the land, and loyally serves his lord Liu Bei til the end. What a noble guy!
Chuck Greene - An obvious skitzophrenic, who will say to his daughter he will come back soon with zombrex, but instead rides a girls tricycle in nothing but his underwear and a SWAT helmet while throwing guitars at zombies. Pure. Awesome.