I can't believe I missed this thread. I can solve your problem.
If you want frighteningly dark; try Schoenberg, the man wrote music of experiences in concentration camps; nightmarish stuff.
Prokofiev, having grown up with those fucking commie tyrants in Russia came up with some brooding stuff. Try either Romeo and Juliet and/or his first three piano concertos;
especially the 3rd. Dangerously brilliant and rousing stuff.
But my fave, by far, is Ludwig Van Beethoven. The man transcended reality and "seized fate by the throat" as he put it.
Here is a list of some of my faves and some of his darkest works:
-Symphony Nos. 5 & 9.
-Piano Concerto #3 in C Minor- the ultimate statement in musical extroversion.
-Coriolan Overture in C Minor- Beethoven wrote this haunting movement in one night.
-The Ruins Of Athens- the greatest incidental music ever written. The Chorus of Dervishes will literally leave you headbanging. Heavy shit.
-Piano Sonatas # 17 "Tempest" in D Minor and #23 "Appassionata" in F Minor- there is no greater evidence in music that proves that minor keys give the composer a wider means of emotional expression than these two pieces. the former is my favorite piece of music ever written for the keyboard.
-Op. 129 - Rondo a capriccio<The Rage Over The Lost Penny>- a really wild piece.
-Op. 77 Fantasia in G Minor- Perhaps the closest thing to what Beethoven's piano improvisation sounded like.
-Op. 70 The "Ghost" Piano Trio in D major- just like it says.
-
String Quartets-
No. 1 in F Major- the second movement being my favorite string quartet movement ever.
No. 4 in C minor- awesome and catchy as hell
No. 9 in C major "Razamovsky"- altogether the most entertaining string quartet ever written.
No. 11<Op. 95> "Quartetto Serioso" in F Minor- a miniature masterpiece that explores ghastly worlds.
No. 14 in C# Minor - Seven movements of haunting brilliance. The final movement is explosive in its raw power.
Choral Music<now we're talking
>
-Funeral Cantata on the Death of Joseph II. Really, really dark. Beethoven wrote this when he was barely 20. It was too difficult for any ensemble to play at the time. I want this to be played at my funeral.
-Op. 80 Choral Fantasy in C Minor - Okay, all I'm going to say is listen to this piece and try to find a really good recording. This is quint
essential Beethoven.
-Op. 85 Grand Oratorio "Christ On The Mount Of Olives" - the greatest piece of music ever written. Ever, ever, ever, ever, ever, ever,
EVER! A deeply emotional piece with melodies so colorful, dark and brooding, and joyfully blissful. He wrote it right after his "Heilligennstat Testament"- where he stated that he nearly took his life when his deafness was insurmountable but only his "art held him back".
-a note to any Symphony X member who might be reading this-
If you were to utilize just a few of the melodies in the last listed piece; you would have a record of unbelievably dangerous proportions.