Heytvelt??? He's nowhere near the same category as Lowhorn.
His drug arrest notwithstanding, Heytvelt was an athletic big who wanted absolutely nothing to do with playing in the paint. If you can shoot like Dirk Nowitski or Ryan Anderson, fine. But if not (like Heytvelt)... meh. Just another big who wants to shoot threes instead of set screens, box out, and get layups.
Lowhorn could do it all - score, create, shoot, rebound, handle. He was just a classic tweener... didn't have the height to play the 4, didn't have the speed to play the 3.