Rayman Origins and Legends are both by far better than any 2D platformer Nintendo has released in the last 10 years.
Reminder that 10 years ago was 2005, so let's go down the list...
2005;
DKC3 GBA Port (lol)
2006;
Super Princess Peach (Might be worthy)
Yoshi's Island DS (lol)
Kirby: Squeak Squad (lol)
New Super Mario Bros. (Effective but still lol)
2007;
Wario: Master Of Disguise (LOL)
DK: Jungle Climber (LOL)
2008;
Wario Land: Shake It! (Artistically, maybe. Otherwise lol)
Kirby: Super Star Ultra (Might be worthy)
2009;
New Super Mario Bros. Wii (LOL)
2010;
Donkey Kong Country Returns (Might be worthy)
Kirby's Epic Yarn (Hmm...)
2011;
Kirby's Return To Dream Land (Might be worthy)
2012;
New Super Mario Bros. U (Nah)
New Super Mario Bros. 2 (...)
2013;
New Super Luigi U (...)
2014;
Donkey Kong Country: Tropical Freeze (This one is probaly better than the Rayman games)
Yoshi's New Island (Hmm...)
Kirby: Triple Deluxe (Might be worthy)