Hello! I'm Lucio, musician, singer and music producer.
I have listened to "The Epic of Gilgamesh" and I can record with guitar (Or with some synth instrument if you prefer) whatever you need, like melody, chords or both.
As a singer, I am a tenor, I have no tuning problems and I can follow your instructions precisely. I have won a singer's contest within Freelancer (You can check it on my profile).
If you want you can give me some indications of what you need for this project and I can prepare a sample to send you (Free of charge). So you can evaluate the quality of my work.
I hope we can get in touch soon,
Thanks!
Lucio