
The following are some good examples IMHO
http://www.youtube.com/watch?v=ZDFFHaz9GsY
This is Verdi's Requiem. The section of that video is the Dies Irae movement which means Judgement day, so basically that piece is telling about the woes and cries of the earth during jugement day. To me it sounds like the angelic voices of the angels singing songs of pity over the charred burned Earth.
http://www.youtube.com/watch?v=Zi8vJ_lMxQI
Now this is another Requiem but it is extremely unique. It's written by Mozart and was Mozart's final composition, although he never finished it. To me, it sounds like all of Mozart's rage stored in one piece, Mozart was after all treated poorly during his time, hence his poverty. He had several severe illnesses that dragged him down and dare I mention Salleri, the man who is rumored to have poisoned Mozart, and screwed up basically most of Mozart's career. The piece starts with a subtle theme before leading into the Dies Irae passage.
http://www.youtube.com/watch?v=zGBXA1tBiLw
This is perhaps my favorite among them all. Originally a Concerto, A concerto is a musical form of composition which involves a solo instrument accompanied by an orchestra. But this is a solo version. Deviously hard, just wait and see what happens after the opening chords. A totentanz is called a dance of death. When Liszt was composing this, he was obsessed with death and interviewed people who were on death row as inspiration. Truly madness at its finest here.



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, my favourite being the ocean etude, winter wind etude and the octave etude, pretty ironic as they are all the last three in order