Sovereign debt worries in Europe are causing global economic growth trends to slow. This is bad news for the energy industry, which thrives when the business cycle is in full swing and demand for its oil, natural gas, and refined products, including fuel and industrial chemicals, is high. But in an attempt to buy low and sell high when market conditions improve, now might be a good time to consider investing in market leaders with reasonable valuations. Below are five stocks that present enticing plays in the beaten down energy sector.