Here's another addition to the possibilities for President. Herman Cain who's on the Republican side.
Herman Cain is an impressive fellow I think because he's a business man (he has returned unprofitable franchises like Godfather's Pizza and Philadelphia area Burger Kings which probably sounds like poor qualifications to run a country but politicians like Barack Obama can't claim something better), he strongly believes that the US is still worth mantaining as a great nation, and he seems to have some good ideas. I know, I didn't give much evidence and I probably should put a little more work into it, so here are some links
http://en.wikipedia.org/wiki/Herman_Cain#2012_presidential_candidacy
http://www.hermancain.com/the-issues
That probably isn't good enough but, I unfortunately don't feel like writing much more at the moment.
I should note that recently in a FOX news debate (yes FOX) he debated with low profile Republican hopefuls like Tim Pawlenty, Ron Paul, Gary Johnson, and Rick Santorum. He was declared the victor of the debate.
(Alright, I know I haven't presented many facts. At least watch a speech though, he's an awsome speech maker.)
One last thing, remember that Philosopher King is not the best idea for a modern politician. They are idealistic and can cause totalitarianism, see Marx, Engels, and Plato himself (he inspired Ayatollah Khomeini to an extent on how society "should" work).