Iniesta was the heavy lifter, 2006, 2009, 2010, 2015, you name it. UCL final vs Arsenal, Chelsea, WC final, UCL final vs Juve. To name a few.
Iniesta was a guy who had talent more than anyone except Messi, that is including Zidane too. Stats wise many would argue he was not so special, dribbling wise and inteligence wise, as an old Barca fan, he is the best advanced midfilder since Maradona. He lacked the body strenght of Messi to be in the discussion with Messi and Maradona. As Neymar lacked the body strenght of Ronaldinho. Maybe the body mass and cm for shots and executions like Zidane. But compared to Zidane he was swift, agressive in play, always searching to cut the lines. Zidane was slower, less of a dribller, but had the body mass to compensate.
My honest opinion.