Esther saved her people from an evil plot. her story is found in the book of Esther.
Eve, the first woman, is found in Genisis.
Ruth, a woman in the line of Jesus, is found in the book of Ruth.
Mary's story is in Luke 2
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There are many great women in the Bible:
Deborah, the first woman judge (Judges)
Mary Magdalene (the gospels)
Abigail, who so impressed King David he married her (1 Samuel 25)
Lydia, an early convert to Christianity and prominent business woman who hosted Christians in her home (Acts)
Rahab, the prostitute, who saved the Jewish spies and learned to love God herself (Joshua)
The unnamed woman in Proverbs 31. Scholars believe she is actually based on a compilation of virtuous women.