If free-to-start (as that's how Nintendo prefers to call them - and often more correctly so imo) are counted, then Paladins and Fortnite are probably part of those.
For the rest, Skyrim, 2 Fifas, Mario&Rabbits: Kingdom Battle, Minecraft, Octopath Traveler, Crash N.Sane Trilogy are mostly confirmed million sellers. Which would bring us to 23 with the FTP titles, neat how that works out.
If those are not counted, then I guess Super Bomberman R and one of the Just Dance titles fill up that gap.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454