Sangtiennoi Sor. Rungrot was one of the most famous fighters of his time. He was known as the "Deadly Kisser" for..um, kissing his opponents. Yeah...
He's gone on to fight past his prime against much younger opponents, and eventually moved on to training great fighters like Samkor and John Wayne Parr
To be honest, as a fan, I'm not incredibly impressed by Sangtiennoi compared to the other fighters of his era. I'm sure a lot of Muay Thai enthusiasts will crap on me for saying that. However, he is still one of the greatest, with precise strikes and a methodical fighting style.
For more info on the Deadly Kisser: http://news.axkickboxing.com/article?id=118
Vs Orono P.M.: http://www.youtube.com/watch?v=P8mOOrozFgk
Vs Ramon Dekkers: http://www.youtube.com/watch?v=zSKvpFKfB5o