The console market? I'd go with Nintendo, followed by Microsoft, followed by Sony.
Nintendo introduced motion control gaming, brought in a larger audience, made touch interfaces the default even on non-Nintendo platforms, is largely responsible for the retro revival of recent years, etc. If the console market grew at all from Gen 6 to Gen 7, it was because of Nintendo.
Microsoft didn't invent online play or anything, but their actions, including paywalls, a stronger emphasis, achievements, etc, have come to define it. However, they lose some points because PC gaming and the Dreamcast. did some of this first
Sony's hardware hasn't done much other than add Blue-Ray, their games, though new IP's rarely add much new to their respective genres, and even their truly remarkable actions, like the success of PS+, have not quite reached their full potential yet. The past 10 years have mostly been defined by them being the relatively "vanila" company on the market, which has both worked for and against them at various points.