Nintendo hires composers that can create memorable soundtracks (Koji Kondo (Mario, Zelda), Kenji Yamamoto (DKCR, Metroid), Mahito Yokota (Galaxy), and Hirokaza Tanaka (Animal Crossing) did the games you listed, and I also like Yuka Tsujiyoko (Fire Emblem), Jun Ishikawa (Kirby) and Junichi Masuda (Pokemon).
But there are others in the industry that can do this. Yoko Shimomura who worked on Dream Team and Xenoblade that you listed has plenty of other games. Also look at Motoi Sakuraba, Nobuo Uematsu and Yuzo Koshiro.
It's more like, only Japan can do it. As you say, the West are more interested in background, film score like composers. Again though, there are a few who are capable of being memorable. Jeremy Soule (Skyrim) is someone who does both.
