There is no "best" president of the United States. The ranking would be different based on your personal ideology, the causes you care about the most, and the interpretation you make of the presidents' actions.
However, if you were to pick one, there are some choices that are likely to be popular. Abraham Lincoln is one, as he was responsible for the abolition of slavery. George Washington is often mentioned too, as he was the first president of the country. Franklin D. Roosevelt is celebrated due to his role in overcoming the Great Depression and his New Deal.
