As far as hardware sold Nintendo is on top, and as far as software goes, Nintendo is also top. But I guess none of that matters since handheld consoles can't be considered hardware.
Still, I would say that Nintendo is the most important, as it's the one that offers a different experience from the rest. Sony and Microsoft are interchangeable as they basically offer similar consoles.
"I've Underestimated the Horse Power from Mario Kart 8, I'll Never Doubt the WiiU's Engine Again"







