First of all, Harden leaves Philly. If Portland wants to rebuild around a future All Star caliber young player, they should be going for Tyrese Maxey. In addition, Philadelphia gets rid of Tobias Harris´ toxic contract. After making some moves on his current roster, Philadelphia gets some free agents: Loonie Walker IV and Romeo Langford (both of them would have a major role on Philly), Jae Crowder (who have said publicly that wants to be more important than what he has been in Milwaukee) and Jaxson Hayes (young and athletic C who can play next to Embiid or without him; at New Orlenas, he has to fight for minutes with Jonas Valanciunas, Larry Nance Jr and Willy Hernangomez).
Philadelphia would start the 2023/24 season with this roster:
PG - Lillard - Walker IV.
SG - Melton - Langford.
SF - Crowder - McDaniels.
PF - Tucker - Reed.
C - Embiid - Hayes.