Ford is the most likely. He's still very young and I don't think he's done with politics yet.
Ford's living in the wrong state—he lost a competitive open seat race in the best year for Democrats since Watergate against what many believed to be a less-than-stellar opponent.
Still, I grant that it is quite possible he could wind back up in his old congressional seat if he really wants it badly.
Right now, he's presently enjoying living it up in NYC every evening with a couple of blondes attached to him. At least last I saw.