Popular music has produced an assortment of titled talents: The King (Elvis), the King of Pop (Michael Jackson), the Queen of Soul (Aretha Franklin), the Queen of Tejano music (Selena) and the First Lady of Song (Ella Fitzgerald), among others. But there’s only been one Boss.

That, of course, would be Bruce Springsteen. The New Jersey-born rock star is known not only for his songwriting but also his phenomenal concert performances across the decades with the E Street Band. The group’s latest tour forms the backbone of the Emmy-contending documentary Road Diary: Bruce Springsteen and the E Street Band, streaming on Hulu. It’s directed by Thom Zimny, who has collaborated with Springsteen for almost a quarter-century now.

“It’s unbelievable. [I’m] so grateful,” Zimny said as he appeared at Deadline’s Contenders TV Documentary, Unscripted & Variety event. “What made this one unique, Road Diary, was that I was coming into the process very,...