A great player. But I don't see any reason to suddenly rate him above Xavi/Iniesta if you didn't already. And I didn't already.
Even just focusing on international football, someone like Iniesta was on the team of the tournament for Spain's first Euros win, was MOTM in their semi-final win in that tournament, then was MOTM in a World Cup final win, scored the winning goal in a WC final, was on the team of the tournament for that WC, then was MOTM in another Euros final win while being overall Player of the Tournament in that Euros having been MOTM in three different games. If you claim that he benefitted from being surrounded by excellent players then it's all the more remarkable that he was so consistently their best performer on those biggest occasions. Even when they stank the place out in 2014, he was their best player.
It isn't an insult to Modric to say that he has in no way outstripped Iniesta on this stage, even with excellent performances like today's.