Daenerys Targaryen, Sansa Stark, and Sarella Sand. I believe Alleras = Sarella. I admire a lot of the qualities of these girls. They have not crumbled under pressure. Cersei, Mellissandre, Val, and Cat are strong too but I am not so much interested in them.
Daenerys and Sansa are very good at coping. Sansa gets criticized often for spending too much time in daydream. Too much time away from reality is not helpful when trying to solve a problem. It doesn't get any work done. But it saved Sansa's life. We should not forget, she is a prisoner and the Lannisters can take her ilfe at any moment. This coping mechanism, escaping in her fantasy world, saved her life. It allows her to endure captivity. She has a little of George Martin's childhood trapped in New Jersey watching the ships coming and leaving port. Daenerys does it even better. Khaleesi looks for a way out of the predicament because she has very good problem-solving skills. Daenerys took an awful situation and turned it into a step ladder to power. She decides her own course. Dothraki customs be damned, she is not going to Vaes Dothrak! I love Daenerys because her strength and intelligence are at the top.
I don't think Sansa is smart but she's not dumb either. She is what you might call the average girl. She makes the best of the situation and escapes back in her make believe world of songs and romance to survive. I also don't think everybody has to change the world and make a big splash. Sansa will survive Petyr Baelish and find her own independence. I believe independence is the end game of Sansa's story. Becoming stronger and learning how to live without a man is power for a woman. Perhaps she finds herself entering the order of the Septas.
Sarella is the best at disguise. I am saying she betters Varys and Mance. She doesn't accept the traditional woman's place and I love that about her. She better be really good because Sam Tarly will need a protector. Capable fighter in addition to being a scholar. Twice what Sam is. She has to possess a lot of discipline in order to maintain her deception. I am glad this girl is on the same side with Marwyn.
Meera Reed is also strong. I want to see how she copes with Jojen's death and Bran's future advances. Galazza Galare is very strong and the likely Harpy. I do not think Tyrion can out smart her.