I was surprised at Steve Jackson. I figured he was more of a "hate all of them" kind of guy. At least he hasn't made enough of a fuss for me to notice before now.
I was under the impression that Jackson was more of a libertarian, but that's a batch that's not particularly happy with Trump either, so maybe he decided to go for the 'respectable' side. Or I was just completely wrong.
He, Jeff Dee, and Warren Spector are probably the biggest names that weren't on the 2016 list. I'm surprised Mentzer's not on there, given his backing of the Democratic convention earlier this year.