Andrew Cuomo
Joe Biden
Kirsten Gillibrand
Brian Schweitzer
Hillary Clinton
In that order, from most to least likely.
Hack list.
In my opinion, this is not a hack list (even though I should have but Schweitzer and Clinton above Gillibrand). I just think Republicans need to have a longer time than 8 years for their brand to recover, especially how many people remember If there is a recession in 2016 or before, sure the GOP may win, but personally, I don't see a recession on the horizon until after the 2016 elections.
You are going on the presumption that Obama will deal with every crisis that we face in a good, amiable way. You imply that he will fix everything. If it wasn't a hack list you would have included at least one republican. "Bush's inept and corrupt Presidency", ok, yeah, I'm sure that everyone remembered Nixon when they elected Reagan in 1980. There are so many variables that immediately presuming democratic rule for the next 12 years is unrealistic.
To be honest, we are looking at bad figures and many problems ahead. I give Obama's chances of success (Very generous, actually) at 50-50. I maintain that he probably will be re-elected, but you can't make such predictions from here.
Even if 2010 results in somewhat of a turnaround, we may be looking at another recession in 2012 or 2013. Figures aren't looking well. He could turn it around, he could not. Either way, your assumptions show wishful thinking and some form of hackery.
You could be right in calling 2016 for the Democrats. However, you imply that it seems assured with your list.