Harriet Tubman was a great impact for this because being a black man was hard, but being a black women was even harder because they had less rights then men.
This can be shown as Martin Luther King Jr because this is near to where he gave his "I have a dream" speech and that can also shown at how MLK took action similar to how Harriet took action.
Jackie Robinson was the first African-American who ever played baseball and the first to be in the hall of fame. Jackie stood up for himself no matter what others told him to do and kept playing the sport he loved.
After refusing to give up her seat on the bus, she ended up going to jail for 1 year just for that.
Martin was willing to sacrificed his life for equal rights and he did. Harriet Tubman did the same when she would take slaves up north.
Jackie faced many hardships along the way. Not everyone accepted that a black was in the MLB. They spit at him and threatened him as well but he still played. Harriet did the same thing when she was threatened, she still went north and took back slaves.