I don't think people understand what's the core audience of something like Jeopardy. It's not you reading this right now and it's not some progressive kids either. It's mostly made up of grandmas and grandpas that are old enough to still be racist as fuck.
Please stop trying to push a black guy to host the show. It's literally the worst idea you could have. You'd be insulting and driving away the main audience, and someone like me has very little interest in Jeopardy, with or without LeVar Burton.
Want Jeopardy to still get in some views? Find a nice looking and wholesome old cracker man. Don't mess with the formula.