This first one is a 3-team trade:
Blazers Aspect:
Trading CJ McCollum and Derrick Jones Jr for OG Anunoby, Tyrese Maxey, George Hill, and Pick 28
They get younger, begin the rebuild
76ers Aspect:
Trading Ben Simmons, George Hill, Tyrese Maxey, and Pick 28 for Kyle Lowry and CJ McCollum
They add playmaking and shot creation, sacrifice some youth (but they keep Matisse)
Raptors Aspect:
Trading Kyle Lowry and OG Anunoby for Ben Simmons and Derrick Jones Jr.
They take a little risk by buying low on Ben, but with their player development history, the risk should pay off.
Trade 2:
Damian Lillard for Jaylen Brown, Aaron Nesmith, Romeo Langford, Moses Brown, 2022 first, 2024 first.
Celtics make a splash and get a top-12 player in the NBA. Blazers get younger, yet again.
Trade 3:
Jusuf Nurkic, Robert Covington, and Norman Powell for Andrew Wiggins, James Wiseman, and Pick 7.
Golden State isn't trading for a "third star," but they do keep Pick 14 (likely Corey Kispert) and become the deepest team in the NBA. Meanwhile Portland gets last year's #2 pick and this year's #7 - great return.
Rotations will go in the comments