I know there's been a thread on this but it's been a year and a half, and many new people have joined since the last thread on presidents.

George Washington:
Thomas Jefferson:
Andrew Jackson:
Abraham Lincoln:
Ulysses S Grant:
Teddy Roosevelt:
Franklin Delano Roosevelt:
Harry Truman:
Dwight D Eisenhower:
John F. Kennedy:
Richard Nixon:
Jimmy Carter:
Ronald Reagan:
George HW Bush
Bill Clinton:

(We've already done the current president enough)