These energy stocks are set to generate significant amounts of cash and will return much of it to shareholders through dividends and buybacks.Devon Energy (DVN 0.77%), Vitesse Energy (VTS 2.62%), and Diamondback Energy (FANG 1.58%) are all high-yield energy stocks with excellent growth prospects. While it's never a good idea to go "all in" in one sector (unless you have a strong view of the price of oil), these three stocks offer good options as part of an income-seeking, diversified portfolio.Gushing cashI ...