Hershey Ingredients: SUGAR, CHOCOLATE, COCOA BUTTER, COCOA PROCESSED WITH ALKALI, MILK FAT, LACTOSE, SOY LECITHIN, PGPR, VANILLIN, ARTIFICIAL FLAVOR, AND MILK
Dove (dark) Ingredients: SEMISWEET CHOCOLATE (sugar, chocolate, chocolate processed with alkali, cocoa butter, milkfat, soy lecithin, natural and artificial flavors).
Ritter Sport milk chocolate Ingredients: Sugar, cocoa butter, cream powder (13%), cocoa mass (45% cocoa), milk powder (5%), sweet whey powder, lactose, butterfat, emulsifier: lecithin (soy), natural vanilla.
My guess is that the emulsifiers will prevent the need to temper.
Here's the ingredients in a standard Callebaut milk chocolate bar (which for sure needs tempering): milk chocolate (cocoa butter, powdered whole milk, organic
cane sugar, cocoa mass).