Gamecube was actually pretty good IMO, it had Metriod Prime after all. Compared to the wii though, well the Wii is more innovative I dont think that can be contested but is it better? Well no, I dont think so.
I dont think so because innovation in and of itself doesnt necessarily make something better. Theres such a thing as bad innovations. Of course the other reason I think the Wii is worse off is because I think a console or PC is really only as good as the games that come with it. This is usually why PC is so much better to me, I have the best selection. The wii, well doesnt. It doesnt have hardly any games tnat Im remotely interested in. I mean monster hunter sure, I love that game but I really strain to think of other titles on the Wii that I enjoy (and no I dont really enjoy the new mario, Zelda, and definitely not other M).
As far as nintendo's console versions, if innovation was the sole thing I used to judge a consoles worth then the Wii would be on top. However if Im being completely honest with people then my list from best to worst would go something like this NES, SNES, Gamecube, N64, Wii. That list is made from a ton of different factors though