I do not want to sound like "That Guy," and hopefully y'all know me well enough to know I don't mean it that way, but . . . I sometimes worry Akiyama doesn't get enough credit for his original compositions. Everybody knows Broken Moon, and there's a decent respect for Oriental Memory of Forgathering Dream and The Ground's Color is Yellow, but after that the general familiarity seems to dwindle. There's still pieces like Shinkirou Orchestra, Bell of the Antipodes, and Our Hisoutensoku (one of my personal favorites in the entire series). I was actually a bit disappointed when I heard 17.5 wouldn't be composed by him (though I do like what I've heard from it thus far).
Anyway, since I'm here, some of my favorite music made by ZUN:
Septette for the Dead Princess (somehow perfectly fits any genre)
Ghostly Band ~ Phantom Ensemble (specifically the Phantasmagoria of Flower View version)
Whereabouts of the Heart ~ Pure Furies (possibly the peak of ZUN)
And for the sake of better contextualizing the thread a bit better, some themes from outside of Touhou:
Girl's Legacy ~ Pandora's Box (SC-88Pro version)
Velvet Maiden ~ Velvet Battle (.wav version)
A Drunkard's Lemuria (original, not the "Retro Ver.")
(EDIT: This post was made in indirect response to an immediately preceding post crediting The Ground's Color is Yellow to ZUN; that post no longer being there, this post looks especially unnecessary, and I wanted to clarify why it's here.)