I would say hands down artemis entreri. He represents the inner strength most people wish they had. He is stealthy, cunning, ruthless and sadistic. All of my favorite qualities in a assassin. He is also my inspiration for my main protagonist in my own stories-Lucien (who is also a thief).
As for drizzt, I like him. I just tend to think of him as too much of a goody goody. Drizzt is more or less a paladin. He is right in certain sections, but he has flaws.
I still think that if artemis entreri had drizzts training in menzo, he would be hands down the most powerful fighter in the whole FR. He can already tank most drow ....and he's human. Just think about it.