These energy stocks could produce powerful total returns in the coming years.The energy sector had a rather quiet year. The average energy stock in the S&P 500 is only up about 4% year-to-date, compared to a nearly 18% rise by the broader market index. Lower oil prices contributed to the energy sector's lackluster returns. Despite the sector's recent underperformance, the energy industry remains vital to fueling the economy. Here are my top three energy stocks to buy now to capitalize on the expected contin ...