Julia Shortreed - Clockwork Quick and Lightning Slow

Genesis - Entangled

Yuki Kajiura - Lullaby (heh); pretty much any version but the jazzy one with Tulivu-Donna Cumberbatch may fit your mood best. On that note, you'd probably fall asleep sooner than I'm finished listing all the Yuki Kajiura works that can fit the bill. Wayside, A Stray Child, At Nightfall are but a few examples.