If you’re wondering why Glynn Turman keeps popping up in high-profile projects, the veteran actor can break it down for you. “My manager calls it ‘the Glynnaissance,’” said Turman in a Zoom interview, flashing a smile that lights up the computer screen like a Christmas tree. More than six decades after his debut in the original Broadway production of “A Raisin in the Sun,” and more than 40 years since his breakthrough in the nostalgic coming-of-age movie “Cooley High,” Turman is hard at work, scoring plum roles in prestigious films and TV series. The 73-year-old actor is featured in Netflix’s “Ma Rainey’s Black Bottom,” the adaptation of August Wilson’s play that is almost certain to be an awards-season frontrunner. (Turman won the supporting actor prize from the Los Angeles Film Critics Assn. on Sunday for his performance.) He also was prominent in the most recent installment of FX’s “Fargo,” playing the no-nonsense consigliere of a 1950s Black crime syndicate with the head-turning name of Doctor Senator.