Moonlight (Andre Holland, Mahershala Ali, Janelle Monae,)
Confirmation (Kerry Washington, Jeffrey Wright, Wendell Pierce, Jennifer Hudson)
Queen of Katwe (David Oyelowo, Lupita Nyong'o)
Some more:
Morris From America
Miles Ahead (Directed by and starring Don Cheadle as Miles Davis)
Southside With You
The Birth of a Nation (Nate Parker, Aja Naomi King, Gabrielle Union)
Race (Anthony Mackie)
Marshall (Reginald Hudlin, Chadwick Boseman)
Keanu (Key and Peele)
Also some TV shows that are black centric or at least have a black lead to look out for:
The Get Down (Netflix) (Shameik Moore, Jaden Smith)
Insecure (HBO) (Issa Rae, Larry Wilmore, Prentice Penny)
Atlanta (FX) (Donald Glover, Keith Stanfield)
Crushed (Hulu)
Brothers in Atlanta (HBO) (Diallo Riddle, Bashir Salahuddin, Maya Rudolph, Jaden Smith)
Codes of Conduct (HBO) (Steve McQueen, Devon Terrell)