To me Switch feels closer to the 'real' Gamecube follow-up, so i guess that would rather be Wii/WiiU done right?
Still as mentioned above, it's lacking power.. Gamecube was very unique architecturally and maybe closer to mac? Very efficient/optimal balance of components and it could deliver gorgeous games (Rogue Leader, Metroid Prime, RE4 to name a few) with fast loading times thanks to the mini-discs.
Nintendo's 'motto' has always been to put good gameplay before everything else. But back then up until the GC it was never an excuse for tamed technical power.. Snes, 64, GC, the games had everything.