Most badass movie character ?

Max Cady, as played by Robert DeNiro in the 1991 version of "Cape Fear".

Watch the movie before you pass judgement.

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Whoa, I admit this is a bad start here, but I MUST lobby for Chigurgh. He is so determined that his enormous Evil factor clashes with his one track mind to form Badass beyond comprehension, right down to a conversation within the movie about this exact subject. Woody said "determined" was more accurate, but still, they were discussing him as if he was some mythical legend even though he was hanging out across the street from them. The mere act of even opening that case was just as lethal as watching the Ring tape, shooting at Dirty Harry and taking a McLane hostage, all rolled into one. How much of a badass is he? After he was through with his mission his first move was to keep his promise to, well, kill someone. Listening to him trying to explain that to the victim was WTF enough. After that, he kills somebody while obeying traffic laws and walks away with a small sling treating a compound fracture.

I left stuff out. :-) Sorry, AC gets my vote by a mile.

Bane and the Joker. Maximus. Django from Django Unchained. Jason Bourne.

Gandalf. He can manipulate the sunrise and smite a smoke and fire monster (too bad he wasn't on the island with the Losties!)

Django - haven't seen a good pistoleer in a long time.

I'll second Go-Go, although (not to spoil it), hers is not a particularly lengthy part.

Lisbeth Salander in the Girl With the Dragon Tattoo trilogy!

Wolverine X-Men franchise

John McClane Die Hard

Jacob "Big Jake" McAllister - Big Jake (John Wayne movie)

Rooster Cogburn - True Grit (original or remake) & Rooster Cogburn

Gogo Yubari In Kill Bill

Wolverine (X-Men)

Hitgirl (Kick-*** 1 and 2)

Big Daddy (Kick-***)

I can't think of anymore right now who will match these guys above, usually I can think of loads. btw no one is more badass than Hitgirl.

Clint Eastwood and Charles Bronson.

The joker in the dark knight