I have a bit of audio now, and people start using it in GD, so I'll just give you best examples of my songs for GD levels. (My opinion)

1. Leaf

2. ToE cover

2,5. Metal {Dubstep}

3. Exoplanet

4. Stereo Badness

5. Antiharmony

6. Other GD covers

7. Other songs :)

Idk if this helps but i hope that will help you save some time (if you dislike these songs, you can ofcourse choose some other ones. Thats just my opinion, but ofc i like all my songs lol) (2,5 because i added it later)