Bring corn, cream, 2 chiles, and ½ tsp. salt to a boil in a large saucepan. Reduce heat and simmer, stirring often and mashing lightly to break up some kernels, until corn is tender and cream thickens, 15–20 minutes. Remove from heat; discard chiles. Fold in crème fraîche. Season creamed corn with salt and top with crushed chiles.