Mahler died in 1911, insane, because of all that gloriously emotional music he wrote, and the fact that he thought his 'Kindertoten Lieder' caused the death of his children.
He definitely belongs in the 19th century, musically, and I should have added his Resurrection Symphony to my list. It's a killer!
I'm glad I traded Mahler in on Richard Strauss anyway. Mahler's too gloomy. The Kindertotenlieder--I can't handle that.