What is the best piece of music to portray pain and suffering? What piece of music would best show pain and suffering that could then be changed into...

One of the most moving
songs I have heard is "A Change Is Gonna Come" by Otis Redding. This is a rather sad
ballad, performed, however, with great feeling and a sense of hope. Though I am not sure how you
would render the song into something danceable, I am sure you could come up with a
method.