I wide parameters to find trades that at all resembled this one: Playoff teams making an in-season trade of a player who’d been an All-Star within one season for another player who’d been an All-Star within one season.
There were a few other trades that also came within shouting distance of resembling the Harden-Simmons deal
In 1999, the Los Angeles Lakers traded Eddie Jones to the Charlotte Hornets for Glen Rice.
The Nuggets won 50 games while trading Carmelo Anthony to the New York Knicks during the 2010-11 season. Simmons requested a trade, had been sitting out all season and threatened never to report.