My N..H.D project

Hi its me again, I have another project ( of course ) and it's about National History Day. We have to choose someone who changed history in the U.S., I think I'll choose.....something about womens sufferage and their right to vote, or the freedom of african americans, I still have to choose a person though- I think I'll choose Harriet Tubman or Abraham Lincoln.
This is because I like what they did in the history of slavery.