Speaking of realistic trades, something like
this trade (involving second round picks and nothing more) could be an option since it could satisfy everyone (obviously not all fans)
Kemba - Parker - Graham
Lin - Monk
Sefolosha - Batum - Bacon
Miles - MKG
Lopez - Hernangomez - Biyombo
Sefolosha & Lopez are on expiring contracts, Lin too but you try to keep some of them (ideally Lopez & Lin on team friendly contracts, Lin being the priority) once you have found a deal with Kemba. And at worst scenario, you did not torpedo your flexibility and can rebuild around young pieces (Miles, Monk, Graham & whatever pick is left for 2019 besides the 1st).
Even if not perfect, that would be a much more balanced team and the defense would not collapse as soon as MKG is injured. The only real loss would be Cody (knowing he still has some value).
This team has enough versatility to reach play offs. And they would restore enough flexibility even without moving Batum to play a role even in next off season (knowing Biyombo then Batum could be way easier to move during next season).