Get on the phone with Ron Bernstein (like many agents, he loves to gab) and he’ll happily share his views on who’s up and down at the studios — and inevitably, he’ll talk about his latest deals. On a recent call, he hyped the Redstone family power saga by James Stewart and Rachel Abrams, “Unscripted: The Epic Battle for a Hollywood Media Empire”; sure enough, within weeks it sold to producer Steven Paul, who’s developing the juicy Shakespearean drama for television. Bernstein is Hollywood’s most respected media rights agent.