IMO, Oblak had at least as good a case as Neuer.  I probably would have picked Bonucci but if we're going on reputations anyway, I think it's hard to argue that Pique has been better than Godin in the past few years..
In some ways it's tough.  Griezmann is great, but if he's on, one of Messi, Ronaldo, or Suarez is off.   The midfield strikes me as at least defensible.  Iniesta is still arguably the best #10 in the worldand Kroos and Modric are two of the best more withdrawn CMs.  You could probably quibble and say that the Best XI should pick one of Kroos or Modric, but unless you pick a true DM (and I'd pick Kante), I'm not sure who I'd choose.