After 20 years with Paramount brands, MTV Entertainment Studios president Keith Cox is stepping down from his position. Paramount Television Studios president Matt Thunell and Cox announced the news in notes to Paramount employees Thursday, which were obtained by Variety . Per Thunell, Cox’s direct reports, Paramount Television Studios vice presidents Antonia Covault and Todd Baynes will now report to head of Current programming, Carolyn Harris. Best known for being the executive to pick up Taylor Sheridan’s “Yellowstone” at Paramount Network, and kick off one of the most important creator relationships in the history of Paramount, Cox got his start with the company (then Viacom) in 2006 at TV Land network. Popular on Variety His exit comes on the heels of Sheridan moving his overall deal to NBCUniversal last fall, and as Paramount Skydance prepares to integrate yet another company into the fold upon its pending acquisition of Warner Bros. Discovery.…