Almagro's backhand deserves to be in this conversation... it can be quite violent at times and was pretty amazing against Ferrer at the Aussie Open earlier this year (aside from the mental meltdown).
I still think Gasquet has the better stroke. He can do anything on his backhand. It's pretty amazing.
Disclaimer: I'm NOT a coach...
Real tennis: https://www.youtube.com/watch?v=yDqnkLJ9BtM