The answer I believe you are looking for is Alexander Hamilton.

For the record the following bills are considered current (but not in production) by the US Treasury. (I got the quote below from a US currency website-apparently the $2 bill is in current production which was news to me)

"There are also several denominations of currency notes that are no longer produced. These include the $500 bill with the portrait of William McKinley, the $1,000 bill with a portrait of Grover Cleveland, the $5,000 bill with a portrait of James Madison, the $10,000 bill with a portrait of Salmon P. Chase, and the $100,000 currency note bearing a portrait of Woodrow Wilson."