There's a few examples I can think of.
The Evil Within, despite a somewhat annoying grainy effect and not-so-good depth of field (combined with some bad pop-in textures whenever the game loads for the first time), was very well done, in my eyes. Even more if we take into consideration the terrible engine it was made on:
Gears of War 3 should also make the list:
Considering how demanding it is, CD Projekt Red made an awesome job porting The Witcher 2 on such an old console:
Max Payne 3 is quite the looker, and I might add, it's better than GTA V graphically-wise. Can't find any 360 screen, so here's the promotional (bull)shot:
Might think of more later.