From a graphic standpoint, the trophy sure would go to Mario and Zelda due to the wonderful transition from sprites to 3D polygons they did back in 1996/1999.
Although, Kirby 64 got me fooled with that 3D presentation but it was still a 2D platformer by design(with agreat dynamic camera moves to simulate 3D)
I'd also suggest FFX which was quite the remarkable jump from the PS1. I'd be convince easily if you told me it's graphics were still holding up well today.
Switch Friend Code : 3905-6122-2909