Devolver was best, no contest.
Platform-owner-wise, I'll have to give the overall nod to MS this year, I think. Loads of games, even if most of them were for next year or only bare teasers. Still, consistent messaging and loads of stuff for everyone.
Ubi was lovably goofy and had a load of stuff to check out. Third.
Next would be Nintendo obviously. Smash gaffe aside, it had loads of stuff and was reasonably hypeable.
Bethesda after that. I'm just not that much of an Elder Scrolls fan. The bants were top notch though, and even little old me got interested in some of their offerings.
Sony was a snoozefest. Terrible pacing, and the amount and choice of games (and especially their diversity) was somewhat not to my liking. Definitely navelgazing and huffing their own farts.
PC presentation was rather dreadful, with the sole exception of the mic incident. Loads of very interesting games though. Terrible presentation marred an otherwise surprisingly solid offering.
...
Well, and then there was EA. And SquEnix.

Edit: Kinda unsure how to rank the Bethesda-Ubisoft-Nintendo cluster. The more I think about it, the less I can put them in order.