I am currently following an Indian Youtuber named Tushar Lall's Indianized reworks on popular scores around the world. I like almost all of his works. Of them, I will try to recommend you some of the light music tracks you are looking for -
Inception Indian Version (Time) by Tushar Lall
Pirate of The Caribbean Theme (Indian Version)
Titanic Theme (Indian Version)
The master link for Tushar Lall's YouTube channel is given below. You can find many more interesting works of him there.
This is my go to track when I want to relax.
M83 - Wait | TFiOS Soundtrack
These are my good light track. I always listen to this songs whenever i am down and weary.
Not exactly light track as you stated but I do love Linkin Park songs. Their lyrics convey deep message.
Everything from Youtuber Relax-Music
Slipknot - wait and bleed