Oladipo is probably available. I'd make that move even if I didn't think or had no intention of signing him this summer because I think Oladipo could actually make a difference in a playoff series.
Langford, Ojeleye, 2021 1st for Oladipo, Kurucs
Something like that I think make sense for both teams as it gives Houston 2 useful younger players and a draft pick for Oladipo and a guy they aren't playing that has money owed past this year. Boston adds Oladipo and goes for it this year and gets a low money look at young player on the books for next year. I'd probably throw in a future protected 1st if that is what it took to get it done. Boston could also keep Oladipo and potentially move on from Walker at some point, which opens up other possibilities.
Boston post-trade
Starters - Walker, Oladipo, Brown, Tatum, Thompson
Main Rotation - Teague, Pritchard, Smart, Williams, Theis, Williams
That team has a higher ceiling than the current one and I'd take the shot.