No one!! I can't stand Romo no matter how he does in fantasy.. But for everyone else it depends on who they already have.. He's a good QB to have as a backup!
Do you mean who do you take for a backup? It depends on who your starter is. I like Fitzpatrick, and I tell you what: Henne is going to have a respectable top-12 worthy season.
Of the QBs tagged, I would take Romo over all of them. Regardless of if they win or lose, Romo normally puts up good numbers. I believe he was a top-3 QB last year before he got hurt.