Here's a name that I haven't seen brought up here, and understandably so, but is a FA that would come cheap:
Ricky Davis.
Yes, that Ricky Davis. He of throwing the ball off his own basket to get a triple-double fame. I'm well aware that he doesn't have the best attitude and doesn't exactly try on defense. But he shoots the 3 very well (around 40% the past two seasons), can score in bunches, and actually has been one of the best assist men from the SG/SF slot in the past few seasons. He was down to 3.4 APG last year after being in the 5 APG range the previous 3 years (having his entire team get injured may have had something to do with that), but there's no reason to believe he couldn't go back up to the 5 APG range. He seems okay starting or coming off the bench, and we could easily find him 30 mpg in a rotation with Iggy and Thad. Really, he's a point forward who can shoot the 3. Isn't that kinda what we're looking for?