Looking at the free agents on the board, I think we should go after Kyle Anderson. He's not quick, and that's not necessarily a great fit with Fox, but along with great size he's a strong defender, good rebounder, very good passer - just a solid all-around basketball player who doesn't go out there needing shots. And still just 25. His 3 point shot needs a bit of work, but his career percentage is a few points better than Hezonja's, and there were a lot of folks around here that seemed to be OK with him, so...
We could, for stretches or due to injury (cross fingers), even play him as a point forward with Bogdan and Buddy. He's versatile, and while he's no Luka Doncic, you can't have too much passing.
I would not be opposed to putting out a pretty decent contract, betting on Anderson at say 4/$43M. I don't know if that's enough to snag him but in this free agent market where nobody has cash, maybe? That kind of money likely puts the Spurs into some serious luxury tax issues (I'm assuming they're going to bring back Parker at a reasonable salary and they won't be able to shed too much salary in any Kawhi deal) - you're looking at the possibility of a first $10M year of Anderson costing the Spurs maybe $25M+, so maybe they don't match. Can't hurt to try.