You're committing a logical fallacy by assuming that the economy would have recovered anyway, especially given that none of the Republicans would have allowed a Keynesian stimulus to pass. What's more, their position was for more deregulation, not for something like Dodd-Frank. I do not credit Clinton for the economic progress in the mid '90's - I say instead it's more due to Bush 41 when he raised taxes against the wishes of his own party.
There are no presidents who "changed the entire country" in a positive manner, except for Washington, Lincoln, and FDR. And Wilson was IMO the worst president in our history. He was president when the Great Influenza hit. America had about 100M people at the time, and the Flu killed nearly a million...and Wilson never once mentioned it in public, but kept silent in order to preserve the "war morale". Kennedy didn't change the nation, though he did a couple very important things right. Reagan was a great president for two reasons, one, that he won the Cold War, and two, he gave America back its nationalistic pride...but at the same time, he tripled our debt, allowed us to get involved in Iran Contra (which is a bigger scandal than anything the Clintons or Obama did), and helped spread the myth of the "welfare queen". When he announced his run, he did it in Philadelphia, Mississippi, the same town where civil rights activists had been lynched. He didn't do that because he supported civil rights - Google "Lee Atwater quote" sometime - he was one of Reagan's chief advisers. Probably worst of all, he got rid of the Fairness Doctrine that required news outlets to at least attempt to tell both sides of the story. That, more than anything (except for Nixon's "Southern Strategy"), enabled the rise of the Religious Right and the hyperpartisanship we see today.