I'll preface this by saying I fully expect both of these guys to be on our team next year. I think Ainge will probably make minor adjustments (draft pick, veteran signings, retaining Fournier) and want to see how this team goes healthy and vaccinated.
But here are my two ideal trades involving the two.
Kemba trade: https://tradenba.com/trades/QSz65QO-1Boston trades: Kemba Walker, 2022 lottery protected 1st round pick
Chicago trades: Thad Young, Tomas Satoransky, Al-Farouq Aminu, 2022 2nd round pick
Marcus trade: https://tradenba.com/trades/qp8exsW-3Boston trades: Marcus Smart, 2022 2nd round pick
Phoenix trades: Dario Saric, Jevon Carter
I'd then try and move Thompson straight up for Aron Baynes and a future 2nd rounder.
Team would then be:
Tomas Satoransky - Payton Pritchard - Jevon Carter
Jaylen Brown - Romeo Langford - Carsen Edwards
Evan Fournier - Aaron Nesmith - Franz Wagner / Jalen Johnson (1st pick)
Jayson Tatum - Thad Young - Grant Williams
Rob Williams - Dario Saric - Aron Baynes
If I could force a team to do any trade I'd move Smart + Thompson + whatever picks for Valanciunas + Melton.