Trades of this Size rarely happen, especially within the same conference.
But would you?
Celtics Trade: Al Horford, Jaylen Brown, Juancho Hernangómez, Dennis Schroder
76ers Trade: Tobias Harris, Ben Simmons, Shake Milton
New Rotation:
PG: Ben Simmons (Payton Pritchard)
SG: Marcus Smart (Shake Milton/Aaron Nesmith)
SF: Jayson Tatum (Josh Richardson/Romeo Langford)
PF: Tobias Harris (Grant Williams)
C: Robert Williams III (Enes Freedom)
i think people need to give up on the idea of Ben Simmons as a point guard. I know his ball handling, court vision and passing ability are highly impressive...but I just don't see how a guy who truly cannot shoot (not just a poor shooter, he literally cannot shoot AT ALL) could ever succeed at a perimeter position in the NBA. I can't think of any cases in the past 20-30 years where that has happened, and the league is more dependant on outside shooting right now then it's ever been before
If you want to truly excel with Simmons on your roster then I really think you need to use him as at the center spot, where you can keep him near the basket on the offensive end to help hide his shooting limitations. There are plenty of defensive minded bigs (Rudy Gobert, Rob Williams, Clint Capella, Steven Adams) who have been able to excel in the modern NBA despite having zero outside shooting ability. Simmons is an above average rebounder, a decent finisher in the paint, an elite floor-runner, and he can defend all 5 positions at a high level. I see no reason why he couldn't also have success as a center in the modern NBA. Put shooters / scorers around him and run some of the offence through him as an interior playmaker (much like we did with Al Horford in the past) and I think he could have a strong impact.
Only way I can see this proposal working is if we found a way to keep Scroeder and made our starting 5 something like this:
PG: Dennis Schroeder
SG: Josh Richardson
SF: Jayson Tatum
PF: Tobias Harris
C: Ben Simmons
Or even better, if we could keep Jaylen Brown and instead make an offer of Rob Williams, Josh Richardson, Marcus Smart (+ picks if needed) and run with with:
PG: Dennis Schroeder
SG: Jaylen Brown
SF: Jayson Tatum
PF: Al Horford
C: Ben Simmons
Problem is that Simmons is also a bit soft, and a bit of a whiner, and despite his limitations I think he's fixated on the idea that he's a PG. I'm not sure if he would happily accept a role change.