He needs to come to terms with this loss and get some mental help. He should retire, got enough money and did well overall.
I'm going out on a limb here, but Chisora would be a very bad choice right now... Not only does he have a better resume than Ortiz, but he wouldn't give Wilder any time or space to wind up - and he hits harder than Fury. I'd feel generous to call that a 60/40 for Wilder if it were his next fight. Seriously.