I can't speak for Ni No Kuni II as I have yet to play it. But for the rest I would say there's a fair chance you would love all of them.
But I want to emphasize Nier: Automata. Because what really stands out about Nier: Automata is not something you can see in trailers of the game. Not even from playing the demo of the game, because at that point it still 'only' appears to be like a Devil May Cry or Bayonetta type of game. Which isn't bad, mind you. But Nier is so much more than that. Both in terms of gameplay, and it's narrative.
As a reviewer put it:

"I think the entire gaming industry, while celebrating Nier: Automata, is drastically understating how incredible and important it is. Nier: Automata is a rare breakthrough moment in the history of our medium. And is an absolute must play for anyone who appreciates videogames. Or good storytelling. Or increadible music. Or true innovation in any of the elements I just listed."


https://www.youtube.com/watch?v=-NiyfG8Ctbo&feature=youtu.be

^This reviewer explains it very well.
I think out of all these games you listed, the one that runs the highest risk of being overlooked is Nier. Because while the appeal of Persona 5 or Monster Hunter can be very obvious, it's not the case for Nier: Automata. Where it's combat system easily distracts from the fact that it's actually much more than a DMC/Bayonetta type of game.
I recently had a conversation with someone on this forum who said they consider the story semi-revolutionary, but didn't expect it because of the gameplay.
Me on the other hand expected a good story, but I thought the stylish combat system would still be the main takeaway from the game. It's not. It's not even third on the list.
That said, the gameplay, including the combat, was very good. I had some things to say about the game in that other thread (before finishing it) that I'll copy and paste here:

I feel like there's a good chance you'll get to at least Persona 5 and Monster Hunter: World eventually because of the hype and how they are presented. So I'd suggest you play Nier: Automata first. It's a game no videogame fan should miss. Especially if you like rpgs.

It probably has more in common with an action rpg than any other genre.

Out of those 4 I only played Persona 5. While I did find it enjoyable, it also got to the point where it dragged on, so keep that in mind if you're playing that.


Here is a list I made of the top of my head if you want to dive in more, though:

Final Fantasy X/X-2 HD Collection
Final Fantasy XII: The Zodiac Age
Final Fantasy XV
Tales of Berseria
Nioh
Dark Souls II: Scholar of the First Sin
Dark Souls III
Bloodborne
Odin Sphere: Leifthrasir
Disgaea 5
Valkyria Chronicles Remastered
Kingdom Hearts HD 1.5 + 2.5 ReMIX
Kingdom Hearts 2.8 Final Chapter Prologue

Thanks for the responses guys. I'll probably pass on Bloodborne and Nioh, just because the Souls games aren't really my thing, and both seem very much in the vein of those. I hope to play all the ones in my OP eventually, but for now just trying to decide on one. And considering all the games coming this year and how backlogs go, realistically whichever one I go with first may be the only one I actually do end up getting around to. The consensus definitely seems to be between Persona 5 and Nier, so that helps me narrow it down. Hiku's post on Nier is definitely making me tempted to go with that. The variety in gameplay looks really intriguing.

I couldn't agree more with eveything you said.

Nier Automata is one of the most memorable games I have ever played and it has my  favorite story in any video game and honestly I doubt anything will ever surpass it. I still think about it even though it's been months since I finished it. Seeing those pics in your post even makes me nostalgic. The game is just incredible and unique.

Honestly my initial response would be: Sell it, get a PS3 and play LoD. lol

But as he'll be definitely getting it for God of War I decided to asnwer his question instead.