Heat oil in a Dutch oven over medium-high heat. Add onion and next 6 ingredients (onion through cumin); sauté 3 minutes. Stir in water, bulgur, tomatoes, and tomato purée; bring to a boil. Reduce heat; simmer 30 minutes or until tender. Stir in corn and beans; cook 5 minutes. Ladle chili into each of 9 bowls; top with cheeses and sour cream.