PG - (free agent)
SG - Monk
SF - Tatum
PF - Ben Simmons, Saric
C - Embiid, J.Okafor
Maybe Jeff Teague as the free agent.
I think Bryan Colangelo will want some shooting and scoring on his team. I like Tatum here. I think he would be a good fit alongside Simmons and Embiid in the frontcourt. I went with Monk because I think he is likely to be available with their later pick.
I know there is no trades but as an aside ...
I'd love to see Brandon Knight on this team. The Sixers do not need a playmaking PG with Ben Simmons expected to take over or at least share the playmaking duties. I think Knight would fit in very well as a PG for Philly. Big, strong defensively, solid rebounder, can create for himself and play off the ball, a solid setup guard but lacking in playmaking. It doesn't look like he has much trade value at the moment. I'd love to see Philly make a run at him and move Knight back full time to PG.