I do not think they will replace Hamilton because he was US Secretary of the Treasury. Andrew Jackson was a US President but he might get replaced.
How about Sarah Emma Edmonds(1841- 1898)? While pretending to be a man, he served honorably in the Civil War and was wounded in Combat. She is the only women member of the “Grand Army of the Republicâ€. She was also a Union Spy. She later married and had three children.