The headline speaks for itself, here it comes kids.
The greatest LHW of all time is without a doubt "the Iceman". From his wars with Couture, to his destruction of Tito, Chuck was the baddest man on the planet in his day. He is the only man provided he was in his prime that could have knocked out Bones Jones IMO.
A true legend, Frank dominated the LHW division with 4 UFC title defenses. It would have been hard to find him a real opponent in his prime, at least in the UFC. Though I am sure the UFC could have found someone to test him, Frank vacated his title nevertheless.
3) Tito Ortiz-
"The Huntington Beach Bad Boy" has the most title defenses of all time in his division (5). This gives him the right to be in the top 5 of all time.
"Rampage" The man that unified the Pride and UFC LHW Championships. Enough said.
"The Axe Murderer" One of the most deadly strikers on the planet both then and now. He defended his Pride title 4 times. (Pride MW was actually UFC LHW 205 pounds) The way he would stare his opponents down was like no other, he made some lose the fight before the bell even rang.
Honorable Mention- Jon Jones
"Bones" I feel is one of the best the world of MMA has ever seen. He has nothing more to prove as it is, he already defened his belt 3 times, all against the top guys of today.
Have fun folks, and let the tears begin.