Wii > N64 > Wii U > GameCube
Wii probably had the largest amount of third party support of any Nintendo console ever, only the NES really compared. Not to mention it had the best versions of some third party multiplatform titles, like RE4. Not to mention a robust lineup of exclusives. Many titles selling in the millions with some third party titles exceeding 10 million in sales.
N64 had some excellent third party exclusives as well. I remember some 4 player titles, particularly pro-wrestling games which were surprisingly fun. Of course, there was Ogre Battle 64, in my opinion, one of the best third party exclusives since SNES.
GameCube and Wii U, unfortunately didn't really have anything memorable, not really any exclusives, and bad versions of multi platform titles. No third party titles sold well on these consoles. I put Wii U ahead of GameCube because Wii U had some titles that were kind of interesting, I can't even recall a single third party title from GameCube, I remember it had some bad SSX port, and that's about it.
I describe myself as a little dose of toxic masculinity.
