I don't see the core of White, Brown and Tatum working. Cs need a big man who is elite and team needs to move one of the current core for that big. If Giannis is available I'm not sure Brown for Giannis is what the C's or Bucks would want. Instead I see a better fit if it's something out the box like a three way deal between Memphis, Boston and Milwaukee.
Cs trade: Brown, Walsh, and 2027 top 5 protected first.
Cs receive : JJJ and Tyler Smith
(saves $18 million)
Grizz trade: Morant, JJJ, Clarke, Wells and 2026 choice first.
Grizz receive: Brown and Giannis
Bucks trade: Giannis and Tyler Smith
Bucks receive: Morant, Clarke, Wells, Walsh and two first.
I think this works for all three teams.
Cs Starters
White, Simmons, Hauser, Tatum, JJJ
Bench
PP, Scheiermen, Hugo, Niang, Queta.
Grizz Starters
Pippen Jr, Pope, Brown, Giannis, Aldama
(They maintain assets to flip for a better PG)
Bucks starters
Morant, Trent, Kuzma, Clarke, Turner
(They get a star, back, become more balanced, and land picks)