I don't think Rodman translates well. A 6'7" guy who'd essentially get tossed out all the time and would be a guy whose defender sag off of?
As good a rebounder and defender as Rodman was, he would really struggle. Everyone guarding him would essentially pack the paint. He was a net negative most years on offense, and he was guarding PFs who weren't as mobile. He was also far more physical than they allow now, and he'd absolutely get suspended way more. In a world where he's chasing mobile 4s or 5s, his rebounding comes down by necessity. And it'd be hard to play him at the 5, though you can imagine him as a Draymond-esque center. The difference there, though, is that Dray could at least keep the paint clear on the offensive end.
Pippen was obviously great. I'm less of a Pippen fan than many on the board, but I obviously think he is a great player.