Actually...
Dye her hair black, and she's Wonder Woman. She has the height, the athleticism, and the looks to be an Amazon princess. And a believable one at that.
Excellent point you got there. The sad thing about casting superheroine roles is they never get the right balance of acting ability and physical appearance. For all accounts, Wonder Woman should look like one of those fitness models who does crossfit. However, you can't just hire a crossfit model and expect her to give a good acting performance. Jessica Biel was the last known example of an actress who got buff enough to really be what a superheroine should look like. Male actors like Chris Pratt, Ryan Reynolds, and even Paul Rudd get shredded or bulked up for their comic book roles, but Rachele Brooke Smith and Gemma are the only actresses who come to mind that are fit all year round, and thus are the only actresses that come to my mind for being right for action movie roles.