Getty Images For the fourth straight year, The Hollywood Reporter presents its tally of the on-air talent and dealmakers who are making the biggest waves in podcasting. The list - which considers chart position, deal size, and cultural cachet - captures the industry at a critical inflection point. The immersive, Serial type deep-dive investigations that once defined the medium are dropping out of the charts, ceding the mic (and, increasingly, the screen) to talk shows and camera-ready big personalities.