Please don't take these things seriously. Beyond the ridiculous amount of guesswork that goes into the estimations, there's also the simple matter of sloppy research, silly omissions and vague definitions of who counts as a game show host. Just doing some Googling off the top of my head (using "Person X net worth") here are some people whose estimated net worth would put them on the list above the $15 million they assign Woolery. (And since they included Johnny Carson, don't tell me any of these people don't count for some reason.)
Craig Ferguson
Michael Strahan
Alec Baldwin
Anthony Anderson
Alan Thicke
Wink Martindale
Jimmy Kimmel
Chuck Barris
Anderson Cooper
William Shatner (why not?)
This was in about five minutes, and I'm sure I'm just scratching the surface. And with the exception of the recently departed Thicke, I didn't even bother with deceased personalities or those associated with another country. (Don Francisco? $100 million.) At least "favorites" or even "greatest" is subjective. This list is just full of fail.