I think Dorian Finney Smith is a candidate. I'd check on OG if the price isn't bonkers. In FA the big fish we should consider:
Austin Reaves (a little short as a SF though... I'd sign him and figure it out)
Kuzma - Meh
Harrison Barnes... I know he's 30... he's still productive and I bet he has 3-4 good years left.
Grant Williams - though I don't there is much else there... kinda is who he is.
There are a bunch of other smaller names I'd consider... Shake Milton is having a good season, Naz Reid, Max Strus, etc.
Its weird... we have offloaded so much talent that we should have some real low hanging fruit for improvement... but I'm struggling to figure out the best path.