Though I don’t agree 100%, maybe we, the United States, the prime standard of the world, can fix the issue with some diversity in their intellectual properties.
Movies
1915 Birth of a Nation
Excluding tokens
TV
Friends
South Park
How I met your mother
Sienfield
Etc.
A movie from 100 years ago? That's our standard?
Southpark has black people, white people, asian people, mexican people, gay people, straight people, crab people, handicapped people, able bodied people, christian people, jewish people. But that's not diversity? Or did you mean specifically racial diversity? Just because a show has a cast with a predominant demographic doesn't make them not diverse.
The daughter on HIMYM was part Portugese part Anglo-Saxon, Cristin Milioti is Italian, Belgian, Czech, Scottish, Irish and English, is that not diverse or is the issue she "doesn't appear diverse"? Ranjit, played by Marshall Manesh? And for the record, in amount of appearances these 3 are the next highest after the stars with 65 for Lyndsy Fonseca, 25 for Milioti and 21 for Manesh, I wouldn't call them token.
You had good examples with Friends and Seinfeld though I would argue they're a bit dated now and we've clearly moved past that formula, most shows today have a varied and diverse cast just not equally diverse but that's not exactly the same thing.