In terms of overall success, the Saturn. The darn thing sold 10% as well as the Genesis in North America and 13% as well as the Megadrive in Europe. Looking at total numbers makes it look like a bad decline, but even it being a relative success in Japan can obscure just how bad the decline was.
In terms of being a memorable console, the Xbox One. So far as I'm aware, the only major exclusives for the console are Halo 5, Forza 5, and Rare Replay. One of those is a retro compilation and the other two were not exactly fan favorites.