Earl Zero is, without a doubt, one of my all time favorite roots singers. Like Don Carlos, his voice is the definition of roots to me. He has the ability to thread his voice through a track in a way so that it sounds as if it is just another instrument, almost getting lost in the mix. His songs are tapestries which tell a story.
As I told a recent commenter, its hard for me to describe what I’m hearing, but his vocal threads through a song instead of sitting on top of the instruments
Here is a selection of some of my favorites…
LEGENDARY REGGAE 
i have recorded with Earl and the way he layers harmonies is astonishing. he doesnt put down the main one first, he puts down something quite far from the main tune and builds. amazing experience
I’m glad you get what I was trying to explain. Its hard for me to describe what I’m hearing, but his vocal threads through a song instead of sitting on top of the instruments