What of Hop, Omega and others?
Here and can confirm I am (or at least used) a Nintendo fan. 64, Gamecube, and Wii owner.
Yamauchi and Nintendo singlehandingly saved the video game industry from the crash of 1983, which could have legitimately killed off video games as a genre. Even if you never used a console in your life, the state of PC gaming would be a European niche market at best without the success of console gaming to invigorate the scene. He had some great ideas (The way he structured Nintendo's development team in how they have to compete with the other teams is still genius), and some bad ones (He decided to screw over Sony and their partnership developing a CD drive for the SNES by going behind their backs with a deal with Phillips. This lead to the Playstation). In the end, though, Nintendo owes it all to him for muscling into the electronic industry.
A few things I want to note:
Yamauchi retired in 2002, just shortly after the release of Gamecube. This is very interesting because the plans he had for the Gamecube and what Iwata ended up doing with it are very different. Yamauchi beloved he could win the generation war by building the best gaming experience possible, compared to the PS2/Xbox's attempt of being a multimedia hub. He also wanted to make it cheap, which ended up making a surprisingly powerful console for its time for a low price. Yamauchi also wanted to focus on getting more third party support. Once he stepped down, however, is when the Gamecube became isolationist to third parties and tried to project a "family friendly" image. I feel like this disconnect between initial plans and later plans led to the awkwardness of the Gamecube.
Also, as I said the last time we debated sixth generation consoles, the Gamecube still objectively beat the Xbox for second place despite the above flaws.
More first party games that sold better, cheaper costs to actually make a Gamecube compared to an Xbox, the fact that Xbox only barely outsold the Gamecube, etc, etc. Stop hating on the Gamecube, it was a good console and it did a lot better than people give it credit for.