"Federalists, despite being the party that supported a strong central government, opposed the Louisiana Purchase. It was opposed mostly because President Thomas Jefferson, a Democratic-Republican who supported a strict, or narrow, view of the Constitution, went against his principles of small government and bought the territory anyway. The Federalists used this as fuel against Jefferson and the other Democratic-Republicans in an era where party politics sharply divided the country". They opposed to the Louisiana purchase .
Well if we are talking about voting rights and equality, that would be Martin Luther King. He set equality for black people while Abraham Lincoln had just freed them decades earlier.