Alexander Hamilton: The Man who enabled Jefferson's Louisiana Purchase with his shrewd policies (like debt assumption - cool economic hack) as Secretary of the Treasury. Federalist Papers are/were invaluable too.

Bonus point for not having a mausoleum, library or any other grand memorial as a monument to him.

...though he does have an entire Manhattan neighborhood named after him!

Also exceptionally brilliant.

Definitely. He's someone I aspire to.