Cason Wallace and Hood Schifino are a pass from me, whenever I've watched them play I didn't come away super impressed.
Anthony Black I love, but I concur 100% he's going to Washington or Utah at 8/9 at the lowest. I think a realistic trade up should target picks 6 (Orlando) and 7 (Indiana). With that said, Indiana needs a PF and I'd be SHOCKED if they move the pick instead of taking one of Cam Whitmore, Taylor Hendricks or Jarace Walker. Orlando I could see moving the pick if the price is right, because they have 11 where they could target need (Gradey ?). Their core is set so they need pieces, maybe Keldon Johnson + future first (ideally Charlotte, realistically likely Toronto) would be an enticing offer for that pick, I think Keldon would be much more efficient alongside Banchero and Wagner than he was this past season.
For Bufkin, I think he's a late lottery / mid teens prospect, with a strong fit in Toronto at 13. We could go to Dallas for 10 for maybe Keldon Johnson, but I'm not sure I'd use 10 on Bufkin, I'm more inclined to wait to see if he falls a bit and then if he does you can put together a more reasonable offer for a lower pick, like Atlanta at 15 or Lakers at 17.
I left Amen Thompson for last. I've been saying time and again that I didn't want Amen Thompson to be our top pick. With that said, if the Spurs are truly enamored with him, Houston is rumored to be willing to move the pick for win now pieces. I don't know that we have such pieces, they need to balance out the roster and that requires playmaking, which we don't have in excess. A Derrick White or Dejounte could have been appealing to them, for instance, but right now in terms of value maybe Vassell + 1st would be fair but I don't think they'd do it because of fit.
All in all, I'd be open to opportunities, but those PG options you mention seem pretty difficult / expensive to me. And to be fair, no, I can't come up with a much better one off the top of my head. But some may open up, you never know.
Lastly, I would take a look at Judah Mintz and Marcus Sasser in the 2nd round, not in the same tier, but maybe attainable with either of our seconds which would make for a much more affordable gamble.