The average consumer staples company is offering investors a roughly 2.8% dividend yield. Conagra's (CAG 0.32%) 5.1% yield is much higher than that, with Kraft Heinz's (KHC -0.31%) 5.4% yield higher still.If you are a high-yield lover, these two food makers will likely have popped onto your radar screen. Which one is better? There's an easy answer.What do Conagra and Kraft Heinz do?While the consumer staples sector includes companies that produce a large range of products, Conagra and Kraft Heinz are focuse ...