Ignoring the last result, definitely the Wii U.
The Wii U could have been so much, if not, the best console this generation, if it weren't for a lot of bad decisions by Nintendo. It's doing better now, and with Smash 4 on the way, things are looking good, and hopefully, things keep up during 2015.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."