What president has had the toughest responsibilities and crises so far (including obama)?

Including Obama, and this is just so far, no looking into the future saying "the next president will probably have the hardest time with all the duties of being president" So who do you think? I think maybe like Aberham Lincoln, Maybe Barak Obama, Franklin D. Roosevelt and Herbert Clark Hoover. But idk that's why I'm asking you. Thanks and no hate comments