Tragedy is my least favorite movie genre (Drama isn't much higher on my list). Schindler's List may have been the most recent big success in the tragedy genre.

I believe action and adventure is biggest in movies... in the American market, followed by comedy and romance. I LIKE the subject matter myself! But I have my doubts that a tragedy about some filthy rich arrogant asshat on a bicycle is going to pull people into theaters. Not that I'd know.