These companies have plenty of power to continue paying attractive dividends.Dividend stocks can be fantastic investments. Over the last five decades, dividend payers outperformed the average S&P 500 member (9.2% annualized total return compared to 7.7%). However, the best returns have come from dividend growers (10.2% annualized).Black Hills (BKH 0.89%), Phillips 66 (PSX -0.21%), and Clearway Energy (CWEN 2.64%) (CWEN.A 2.74%) are under-the-radar dividend stocks. However, they stand out to a few Fool.com c ...