Connection: Goneril, Regan and the ugly stepsisters

I'm not saying Goneril, and Regan are ugly (well, Goneril's a couger but I don't even know where to start with that), but the sisters from King Lear and the ugly stepsisters of Cinderella are very similar. They are all power hungry, and stop at nothing to get closer to the top, even if they have to push eachother out of the way. Their priorities and desires are jumbled up, and result in selfishness. And, they are all fools in a certain way. Another thing similar is that both pairs of sisters have a third sister, This third sister is the most independent with her thoughts, and is the one who is much kinder and selfless. She also ends up achieving the most of her dreams in the end. Cinderella marries the prince, Cordelia is set free of all the turmoil going on with her other two sisters. The moral of the characters has an influence on women to stand up for themselves and to be as selfless as possible througout their lives, which is important. One might think that the Grimm Brothers took some ideas from good old Shakespeare...