I just finished Narcos last night. They did a really good job with Escobar's character, I honestly liked him at first. As far as music goes, I'm pretty much in the same boat as @JorickThis is the theme song from Narcos. It's "Tuyo" by Rodrigo Armarante. They have it on Google play music, and I kid you not, I've played it at least 100 times. Mostly because I'll listen to it 10-15 times straight at a time.
If you haven't watched Narcos yet, do so now.