GSW :

Realistically, their chances of being contenders are zero, they should give Curry a chance to win another ring as he nears the end of his career. Bryant + 2 1sts + Fox(I don't rate Fox highly, but in this scenario, he’s a good PG for GSW) would be a sufficient return for GSW.

Rockets :

I don't think it's very likely that FVV will be the Rockets' starting PG upon returning from injury, trading KD +FVV for Curry + Keldon would make the Rockets more competitive in terms of positional balance, and Curry is the PG best suited to help Reed reach his potential ceiling.

Curry / Reed / Amen / Jabari / Sengun --- Smart / Bogdanovic / Keldon / Tari / Adams --> This is a roster that could genuinely be a contender imo.

Spurs :

We saw in the Finals that Fox couldn't be the Spurs' starting PG. And his massive 4 year contract would cause problems when it comes time to extend rookie contracts; instead, adding FVV(he has 1 year contract) as a backup PG would be a much better move financially. I believe that by trading KD, they would become the top championship favorite for the next 2 years.

Castle / Harper / KD / Tobias Harris / Wemby --- FVV / Vassell / Champagnie / Barnes / Kornet --> Perfect roster imo.