Oh, THANK YOU!
I think Goldberry is one of the most powerful women in the entire trilogy because she has established a loving home for her husband in which she is entirely devoted to him and he is entirely devoted to her. By creating such a home she has empowered him to be all that he can be, while encouraging part of his 'all' to be a loving and devoted husband. She is completely fulfilled without having to impress anyone, completely free to be totally devoted to Tom, and able to satisfy Tom so thoroughly that he has no thoughts of leaving to go elsewhere. In other words, she has the power to love completely.
I could wish no more than that Arwen could show such power to Aragorn or Eowyn could show such power to Farimir, or that every wife on FR could show such power to every husband.
Shalom.