Carl Schurz, who was quite a man. A German immigrant to America, he became US Minister to Spain and upon his return was appointed a Brigadier General in the Union Army by President Lincoln. He later became a US Senator and Secretary of the Interior, where he struggled with civil rights issues for former slaves and Native Americans. I think now we’d say his upbringing in Germany formed his beliefs that non-whites weren’t equal to whites. Nonetheless, he apparently tried hard despite his personal attitudes.

Carl Schurz statue, NYC