To avoid accusations of racism, maybe the people who hire voice actors should listen to auditions in a studio where they can't see the person auditioning. They also shouldn't have access to the name of the actor or actress. They would just listen to the recordings of every applicant, and choose the best performance.
I wonder if the proportion of white vs. black would change under these circumstances. I doubt it, but who knows.
Sometimes it may not just be auditions.
A lot of voice directors usually go into a project with a list of people they have in mind for a project. Then they bring those people in to audition if not hiring them directly.
This is why often, for games and other such projects directed by the same person, you tend to see a lot of the same names in the cast lists. For example, I can usually tell if Kris Zimmerman has directed something just by looking at who was involved. She does Metal Gear, No More Heroes, Bayonetta, and a host of others.
I'm not sure how common blind auditions are in the industry though.
But what would that even mean as far as voice acting goes? It's not like hiring a well known person somehow gives the game more appeal. That's one of the big differences between Hollywood and the game industry. Hollywood will go as far as to mislead by making you think that someone who has a small role in a movie actually has a big one simply because of their starpower. You really don't hear about videogame voice actors at all. I mean look at Emily Rose (Elena in Uncharted). Had anyone heard of her before Uncharted? And while Ashley Johnson was known for Growing Pains, most of her work since then has been fairly low key. Her biggest gaming projects before TLoU were Ben 10 games. So i'd imagine it's fairly safe to say that neither of them got it for their fame. And i'd say most of the other casts from ND games fit into that mold.
Perhaps "fame" might not be the right word, but a lot of the VO industry comes down to connections. People like Laura Bailey, Travis Willingham, and Troy Baker (and of course people like Nolan North and Robin Atkin Downes) have worked on so many games with so many directors and companies, and are versatile enough that I'm sure most people who are involved in that side of production are familiar with her and regard her as a reliable talent. It's easy for them to just ring her up and have her in for a gig of any sort, basically.
The names you listed were, I assume, 7 white people and 1 black person. But, in light of the fact that African Americans make up 13%~ of the US population, wouldn't we expect these kinds of numbers? It reminds me of the Oscars So White movement, and how it's focus on Black americans has largely ignored the much greater disparity that exists in the Latino population.
Something is lost in these arguments when people want equal representation based upon the racial population of earth or based upon the history of modern media, rather than based upon the current population of the US, or the racial makeup of individuals that are actively searching for voice acting jobs. Actual data or statistics would be extremely helpful in this kind of situation, rather than how many actors we can name off the top of our head, if we want to see where inequality exists.
The problem is that this mentality of "proportional representation" is what allows the cycle to continue and ensure that white people remain dominant in society and that the playing ground remains uneven. The conversation seems largely about black actors which is why I mentioned them specifically.