Los Angeles Lakers
This is a big one: Danny Green, DeMarcus Cousins (who would be immediately waived), Kyle Kuzma, and Talen Horton-Tucker (who would also immediately be waived), for Kelly Oubre, Aron Baynes, and Mikal Bridges.
Yes, the Phoenix Suns are now basically wingless, but moving Booker to the three with Danny Green sliding into the two could work with Dario Saric then coming off the bench behind Kuzma as a quasi-small/power forward.
With this deal, Phoenix locks up a lot of their current cap space with the addition of Green through next season (a pretty redundant player with Devin Booker), but get their power forward of the future in Kuzma, the addition of both which makes the Suns better right away and give a lot of hope for the very near future.
The Lakers get another scorer in Oubre, a good, and young, 3-and-D player in Bridges, with front court depth in Aron Baynes to help them in their Championship run.