African American

It's been so rare to see an African portraying a person of the continent. My earliest memory is of Paul Robeson in Sanders of the River, Ossie Davis, The Hill, Sidney Poitier, Cry the Beloved Country, Morgan Freeman, Invictus, Whoopie Goldberg, Angela Bassett, Alfre Woodard, to Will Smith featuring the worst Nigerian accent I've heard. The list is long.

As for Samuel L. Jackson, echoing your point 6, I think Mr. Jackson should check himself after starring in yet another ridiculous Tarzan remake myth.

Forgot to include it was a joke growing up that Hollywood always cast British actors as Greeks and Romans, but I don't remember ever hearing about using real Greek and Italian actors instead of Richard Burton or Joaquin Phoenix.