Some composers are undeservedly worshipped. They aren't necessarily bad, just overrated. Strauss Jr., for example, was a nice composer, but only around Joplin level and doesn't even compare to greats like Beethoven and Chopin. Tchaikovsky was also an awesome composer, probably one of the top 20 composers of all time, but for some reason, he's worshipped at the same level as Mozart and Beethoven. (Of course, some are just downright bad: the likes of Yiruma and Einaudi are destroying music.) Here's a list of overrated composers.
Note: If you intend to put up Liszt, Chopin, Beethoven, Mozart, Schumann, Schubert or JS Bach, I don't think Ranker will be responsible for damages. ;)
http://www.ranker.com/list/most-overrated-composers/mwahahahaha,
Erik Satie
George Gershwin
Igor Stravinsky
Johann Strauss II
John Cage
Ludovico Einaudi
Nikolai Rimsky-Korsakov
Philip Glass
Pyotr Ilyich Tchaikovsky
Yiruma