The leading midstream energy company is growing at a brisk pace and pays a lucrative (and growing) distribution.Insiders have been buying units of Energy Transfer (ET -0.99%) hand over fist lately. Co-founder and Executive Chairman Kelcy Warren recently bought another 3 million units of the midstream giant, while co-CEO Thomas Long purchased an additional 20,000. Warren now holds nearly 301.5 million units, while Long's position is now almost 1.1 million, according to data from Capital IQ. Warren is the top ...