Well, I got Pikmin 3, not sure if it's good or not since I haven't gotten to play it yet.
I already had Wind Waker HD, and even though the game stresses me out like crazy it's also really fun so I would reccomend it.
Personally I'm going for Pikmin 3. Though I'd recommend you write down all the ones you want (as a download code atleast), then go and price check them and download the most expensive.
Doesn't the EU get W101? I'd personally recommend that if you've thought about getting it only because either you'll love it or be meh about it and if you're meh at least you can say you got it for free and didn't spend any money.
Aside from that, I honestly still gotta go with Wind Waker. The WiiU was a great time to redux that game, the gamepad is a great accessory to go with it. Also on a way small side note, the Miiverse is actually really stable for that game too.