Cruel
King
The Southern Dynasty period was one of the most turbulent periods of China. There were many short and successive dynasties and none of them stood out above the rest. Emperor Wu of Liang Dynasty may be a good candidate for his period (about 500 AD and the closest leader was Sun Quan from 200 AD), but I think other solid candidates may be found in a much different period of China. In Wikipedia, I found the following southern leaders from Spring and Autumn periods (I was wrong about Warring States):
King Zhuāng of Chǔ (~600 BC), http://en.wikipedia.org/wiki/King_Zhuang_of_Chu
King Goujian of Yue (~500 BC), http://en.wikipedia.org/wiki/King_Goujian_of_Yue
The two kings above were considered 2 of the 5 hegemons in the Spring and Autumn period where they dominated interstates politics. I would recommend King Zhuang of Chu because his kingdom would last until 223 BC and the Yue kingdom was later annexed by Chu in 334 BC.
Do you know a quote for Daozong/Liao?
http://forums.civfanatics.com/showthread.php?t=451102