Plz improve the image of women of color by finding someone more beautiful. Or is it out of your vicious intention to depict a charming and powerful queen in that way?
It won't harm the civil rights movement by selecting a more beautiful actress (African or not) to star the movie. What will do the harm, though, is when you inappropriately choose a less attractive African actress, and make the audience feel that political correctness is bad.
BTW, my favorite quote from this movie is 'O Thou that judges all things, stay my thoughts'. As we all want to withhold painful feelings at times.