I usually look up more to male actors because I tend not to be a huge fan of female ones, but there are a few.
I find that Emma Stone is a great inspiration because she was able to go from a more comedic actor to a dramatic one. That's what I'd like to do. She also said to look up to people, but to be yourself, and find yourself which I take very seriously.
I also love all of the actresses from the 30's and 40's. I love Katherine Hepburn because of her voice and her attitude that she expressed in her movies.