Well done I was coming here to post Rodrigo Y Gabriella!
I've been been listening to them since I stumbled across their self-titled second album when it came out in 2006. Loved the album and the fact that it had acoustic versions of Orion and Stairway to Heaven. I read up about them at the time and how they use to be in a Mexican death-metal band that was not going anywhere and how they left it and started playing acoustic in Ireland and the rest is history.