The energy sector is one of the most important sectors when it comes to maintaining the functionality of everyday life around the world. It powers the globe, securing livelihoods and fueling industries to sustain the world as we know it today.

Unfortunately, this importance hasn't translated to great returns for investors; the energy sector has lagged behind the greater market. In the past decade, the S 500 is up over 157%, while the energy sector of the S 500 is only up 12%. Total returns are up over 211% and 60%, respectively, but that's still a large difference.

Despite the sector's troubles in recent times, energy companies can still play an important role in investors' stock portfolios because of their attractive dividends and the indispensable nature of their business. Here are three to consider.

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Source Fool.com