Not long ago, I would have said L without hesitation.
But now, the more that I think about it, I say Light.
Although he went about them the wrong way entirely and went to extents that I don't particularly agree with, he had good, strong morals and stuck by them until the end. He became power hungry and fairly evil, yes, but that was the power of the Death Note and the fearless power that the insanity of the Death Note gave him playing with his life.
He had good intent and went about them strongly, even if it was wrong. He was a strong and intelligent character all the way through.
L is way to over rated and i don't get why many people think he's hot(eh not my type) yes killing may be bad but Light was getting rid of the bad people in the world, wouldn't that be nice if their was no bad people? he just got too carried away with it.
Eh,I like Yagami-kun to a point,but I love L-sama..Light well gets to carried away especially when it comes to killing,he might think he's doing right doing what he does to the criminals,to make a better world and even that TV Producer..he was rather sleazy in a way..but still it's no excuse for taking a life,taking a life is not justice..it's just wrong,my choice is L-sama!
Because Light said that he would rid the world of evil, but he didn't. Light was just blinded by all the power he had in his hands that he lost sight of what was his true intention.
Sorry, but i'm a Catholic so, i find it disturbing how he could call himself "God". I don't think that he has the right to take others' lives. We are not perfect. We're never free from guilt and sure, you can punish people like that if you never sinned. So,"Let the first one to cast the stone be the first who had not sinned".