Except a Nigerian Brit is gonna play Marley in the upcoming biopic.
Like someone pointed out, it ain't like American actors have that 1960s Chicago accent either, ALL actors use a fake accent for their roles. That's why is "acting", it's always fake.
Did anyone have this energy when Forrest Whitaker played Idi Amin or when Daniel Day-Lewis played Abraham Lincoln? When Denzel Washington played a British soldier or, hell, when Sidney Poitier started in multiple major CRM roles including as a young black man from Chicago?