Buddy Hield, Sacramento Kings
Hield probably makes the most sense for this team as well as probably being the easiest to trade for. It is no secret that he is unhappy with his role in Sacramento and the Sixers could definitely use a sharpshooter like him. He is a career 41.1% shooter from deep and he is a guy who would benefit greatly playing next to Simmons who does an excellent job of setting up 3-point shooters. The Kings would probably welcome a veteran like Horford to get the team back on track.