There are several of such songs (keep in mind, there are other songs that make me happy - I'm just focussing on one type).
The Huntsman (from Once Upon a Time soundtrack)
This is also one of my mom's favourite from the OUAT soundtrack. HOW COULD REGINA HAVE KILLED GRAHAM? *sobs hysterically*
I also love "Rumpelstiltskin in Love" from the OUAT soundtrack, but I couldn't find it in Blogger's YouTube search. (How pathetic, Blogger!) Oh, poor, poor Rumple. :(
And my newest favourite. (When I found out there was a soundtrack for Season 2 I was like:
|No, I don't approve of Glee but this gif pretty much sums up my feelings.|
And then there's Frodo and Sam music from LOTR. ;) Such as
The Breaking of the Fellowship (from The Fellowship of the Ring soundtrack)