I guess they are making this list omitting the ones that got ported to switch, because there isn't; BotW, MK8, Pikmin 3, 3D World, and Tropical Freeze which would easily be in the top 10 for the console. Going off not counting the games ported to switch I would go with:
1. Monster Hunter 3 Ultimate
2. Splatoon
3. Xenoblade Chronicles X
4. LoZ Wind Waker HD
5. The Wonderful 101
6. LoZ Twilight Princess HD
7. Nintendoland
8. Splinter Cell Blacklist
9. Deus Ex Human Revolution
10. Tekken Tag Tournament 2
My Wii U was a Monster Hunter machine until Splatoon came out. MH was a godsend since it came out during that software drought shortly after launch where it was rooough being a Wii U owner with so little to play on their new system. Gamepad functions were great for MH as well, you could make the TV HUD very minimal and having voice chat with the gamepad was so nice and felt like a step back with MH Rise not having voice chat at all.
Also big props to Nintendoland, which is still the best use of the gamepad and a game my family and I still occasionally play to this day.