Ahh, yes, I'm a strange one. As a history teacher, I'd bet money that not only has no one else picked any of my three, but the vast majority of you have probably never heard of any of them.
Valentina Tereshkova (1937- )
First woman in space, predating the first American woman by more than 20 years, then retired in 1969 so she could become a central committee member in the Soviet Union. An accomplished pilot and still revered as a national hero to this day. At the time of her selection, she was a full decade younger than the youngest American in the astronaut program and included skydiving as one of her hobbies... In the 1950s when parachutes were hardly the safest or most reliable pieces of equipment to use. She has even stated that she wants to be on a mission to Mars even if it is a one way trip. Woman has more balls than most of the men on this forum combined.
Qiu Jin (1875-1907)
Chinese revolutionary who worked tirelessly for women's rights to choose who they marry, be equally educated, and to abolish the practice of wrapping women's feet into a "cone" shape [http://en.wikipedia.org/wiki/Foot_binding] to make their range of movement so limited that they had to be dependent on others. She was executed in 1907 for helping plot an uprising against the Manchu dynasty. She remains incredibly popular in Taiwanese literature and the People's Republic of China built an entire museum dedicated to her in Shaoxing City.
Lakshmi Sahgal (1914- )
Hero of the Indian War of independence against the British during WWII, she is both an accomplished military commander and medical doctor. She tended British wounded after the surrender of Singapore in 1942, and later became a Colonel in the newly formed Indian Liberation Army, serving as a commander in the first all-women military unit in Asia, fighting along side Japanese forces against the British. She was finally captured in 1946 and given a hero's welcome upon her imprisonment in India. The British quickly realized the counter-productivity of holding her prisoner and released her. She later joined the Communist Party of India (Marxist) and has served as a member in their upper parliament ever since, she organized and ran relief camps for Bangladeshi refugees during their independence struggle, and in 2002 she was nominated as the sole counter-candidate against the sitting president Kalam.
An honorable mention to the only American who almost made the list:
Jane Addams (1860-1935)
Feminist, Progressive, a charter member of the NAACP, founding member of the ACLU, philanthropist, and champion of women's suffrage. Also, the source of my favorite equality-feminist quote:
"I am not one of those who believe - broadly speaking - that women are better than men. We have not wrecked railroads, nor corrupted legislatures, nor done many unholy things that men have done; but then we must remember that we have not had the chance."
- Jane Addams