2. Johnson
3. Wilson
(It's too soon to throw Bush in there but he's been making a strong case.)
How are you justifying Lincoln? Unless, of course, you are an unreformed racist.
Lincoln did the greatest damage to the black and to the country. The slavery would be abolished without bloodshed within a short time as the institutions of slavery and serfdom were being removed in EVERY civilized country at that time.
But if done peacefully, gradually and by consensus it would lead to the enfranchisement of blacks and granting them the same land and resources for startup as white settlers were getting.
In addition the original sovereignty of the sates would be preserved and federal government would not become the main dominating center of American political life.