Levar Burton is perfect. He has just the right kind of dignified, authoritative presence like Alex had. I'm a huge fan, but Ken seems like too much of a typical "nerd". The contestants can be like that but not the host.
Have you actually watched Ken Jennings play on Jeopardy?
He's shown he has a damn good sense of humor.
Here's an example.
Ken is a likable guy but he doesn't have the old-fashioned broadcaster gravitas you get from Alex. I like that.
So...you want Chris Wallace hosting Jeopardy.
He'd be pretty good but I think he's busy.
He’d be as good at hosting Jeopardy as Trebek did moderating a debate. At least Alex was able to host a show good.