ExxonMobil (NYSE: XOM) is the king of shareholder yield. The company is a pioneer in returning value to shareholders through dividends and share buybacks. In the last five years alone, ExxonMobil's share count has been reduced by 16%. A hearty serving of share buybacks and dividends keeps ExxonMobil management disciplined in an industry full of wildcat empire-building management teams. The benefits of high shareholder yield are evident as the company has outperformed the market consistently over the last 37 years. If I could own only one stock, it just might be XOM.