Now this is an impossible task to pick just the one.
Gonna have to put at least 2 😁

HUGs by Paledusk

This beast of a tune is most definitely worthy of Main Character feels!
The style change around the 4 minute mark is just amazing.

DUSTCELL by TOMOSHIBI

This is another big-feels song, the first 13 seconds of this song really get the feeling going that something big is going to happen.

Then I'm going in a different direction with this next one.

Unravel by TK

His voice is just amazing. It fit the Tokypo Ghoul series so well that it's stayed in my head from the first time I heard it.

I'm actually a theme song skipper, but these beauties kept me intrigued with the first few seconds of each song. They just grow and get so much better as the song progresses.

And lastly, we have Parade by Susumu Hirasawa

Again, this is another amazing song that gives me happy chills every time it comes on. It's so a great song that I can imagine the Hero of the series walking out to this song in their final battle.
Imagine Solo leveling with this bad boy of a tune!

I'm stopping here as I have so many awesome ones that I'll be here forever 😅