The Greatest Clical Composer of all time?

What in your personal opinion is the greatest clical composer of all time? Men like Ludwig van Beethoven, Edvard Grieg, Johann Sebastian Bach, Mozart, or Joseph Haydn? I myself am a big fan of Evard Grieg, especial the song Peer Gynt - In the Hall of the Mountain King. I’m 15 and I have just started to get an interest for clical music. I have started out with some great and well known songs, but do you have any songs that a newcomer in clical music should experience?