I think that we've used up enough payroll that we are out on all of the pitchers you listed. I don't think any of them, especially the last 3, had any interest in signing here. If they did, we probably wouldn't have jumped on Happ so early. If we sign any more FA starters, I'd expect them to be more in the Blanton/Young/Cahill/Lincecum tier.
The smart move in my opinion is to give Sanchez a legit shot to start in ST and add a late inning arm or two later in the offseason.