Here is my list: 

https://www.youtube.com/watch?v=xJtBYAKBByk&spfreload=10

https://www.youtube.com/watch?v=doUNZn9a9xc&spfreload=10

https://www.youtube.com/watch?v=ojeNjpogoqk&spfreload=10

https://www.youtube.com/watch?v=tChbvW-l5Ao&spfreload=10

https://www.youtube.com/watch?v=LSvOTw8UH6s&spfreload=10

https://www.youtube.com/watch?v=LAMiX5EEbFU&spfreload=10

https://www.youtube.com/watch?v=Zcps2fJKuAI&spfreload=10

https://www.youtube.com/watch?v=jSD5vSSGLOM&spfreload=10

https://www.youtube.com/watch?v=aLcnZQ7wt0w

I have more but I figured it would be enough for now. Let me know what you guys think and feel free to write down your suggestions 

Some of these songs are already themes. "Same Old War" by Our Last Night is the Dynasty Theme Song and "My Demons" by Starset is my theme song, but you listed some interesting songs.

Lots of themes.

Porch - Pearl Jam

Bullet with Butterfly Wings - The Smashing Pumpkins

Does The Lion City Still Roar - Less Than Jake

Atomic Garden - Bad Religion

The Fabled Conqueror wrote:

Some of these songs are already themes. "Same Old War" by Our Last Night is the Dynasty Theme Song and "My Demons" by Starset is my theme song, but you listed some interesting songs.

oops my bad, I should have checked lol but I figured that the songs don't have many views compared to others so they might have not been used

Here are some more then :

https://www.youtube.com/watch?v=3YBWEHsXcKQ&spfreload=10 

https://www.youtube.com/watch?v=Ff0nRjH_9zU&spfreload=10

https://www.youtube.com/watch?v=BD64gI_A5Ss

https://www.youtube.com/watch?v=kgS1zjvCPF4&spfreload=10

https://www.youtube.com/watch?v=x2z1bepbfEM&spfreload=10

https://www.youtube.com/watch?v=JcSpxwvbupY&spfreload=10

"Yellow Flicker Beat" by Lorde