I second the vote for Furiosa in Mad Max Fury Road. There wasn't a single second in the film where the fact she was a woman was highlighted. She was just a badass who happened to be female. I loved that! So often in stories the girl defeats the bad guy for the sole purpose of making the bad guy's defeat more complete. Not only did they lose, they lost to a girl! There's none of that nonsense in Mad Max Fury Road
Another character is Sarah Conner in Terminator 2. In Terminator 1 she's a bit of a helpless princess who's only purpose is to be saved by the strong man, but that actually makes her character development better in T2 when she gone to the edge of madness to toughen up for the fight that's to come.