For 10 points, identify this composer of Boris Gudonov and Pictures at an Exhibition.
This man left unfinished operas based upon the writings of Nikolay Gogol, Gustave Flaubert, and Alexsandr Pushkin. Maurice Ravel omitted the Promenade in an arrangement of this man's most famous work, a 10 movement piano suite dedicated to architect Viktor Hartmann. A member of the group of Russian musicians known as The Five, his Night on Bald Mountain was included in Disney's Fantasia. For 10 points, identify this composer of Boris Gudonov and Pictures at an Exhibition.
This man left unfinished operas based upon the writings of Nikolay Gogol, Gustave Flaubert, and Alexsandr Pushkin.
Modest {Mussorgsky}