Scarlett Johansson

Another person with way more comic book character performances on record than I'd originally thought!
The most notable is Johansson's signature role as Black Widow, a part she's played since Iron Man 2. Widow is one of the most loyal Avengers, and has been right there with the team since the beginning. She's also racked up quite a few performances with her supporting roles in the aforementioned Iron Man 2 and the two Captain America sequels.

On the other end of the spectrum was her controversial turn as Motoko Kusanagi in the American film based on anime and manga. While her casting was the source of much uproar, that wasn’t really her fault. Yes, she shouldn't have been offered the role, but she did the best she could with it.

Rebecca in the adaptation of Daniel Clowes' comic Ghost World was a better role. Clowes' stuff may not be for me, but I see its importance. And Rebecca has struck a chord with a generation of disaffected youths.

But back on the negative end, we have Johansson's turn as Silken Floss in The Spirit. Floss was the surgeon/nuclear physicist partner of The Spirit's archnemesis, The Octopus, and that’s all I'm gonna say. Not a great movie.