1.) Okami (Wii)
2.) No More Heroes
3.) Super Mario Galaxy
4.) Super Paper Mario
5.) De Blob
...I only own a Wii...
I agree completely with putting Okami on top of that list but can you really call that game "this-gen"? It was, originally, a PS2 exclusive.
Nevertheless, it shows how "good" the Wii library is, if you put a last-gen game on top of your list.
Or it shows just how good a game Okami is (it really is, awesome).