Aside from exploring different game genres, I've also been looking out for multiple music genres as well.

What is a really good music genre that people would think is underrated and the best song to describe the particular genre?

As someone who listens to everything, I'm going to say ska is very underrated. I could personally not pick out one song to "perfectly" represent ska. Also, punk is vastly underrated. 

'Rock Rap' has been my go to if that even counts.

If you care to listen, check out  an artist by the name of Teezo Touchdown! He's pretty big right now. 

Why not go the opposite direction?

I'd instead pick a band worthy of pulling off multiple genres within the same album, heck, even within the same song at times.

I highly recommend checking out Falling in Reverse, both their old and new stuff. Very talented with what they do!

I am mainly ito rock music. I like 70s rock with alot of guitar. 

Also i like metal music, its mainly metal i have been attending concerts with throughout my life.

heavy metal