Meet the 20 most powerful WarnerMedia execs and their top deputies. Here are the leaders who will help HBO Max battle Netflix and define AT&T's TV future. (T)

· *WarnerMedia has launched HBO Max, its new flagship streaming-video service that will be the online home of all its entertainment brands, from DC to HBO and Cartoon Network.*
· *The streaming debut came after a nearly two-year executive shakeup that started when AT&T exec John Stankey began integrating the entertainment...