To be clear, it doesn't bother me if the authors themselves are liberals, as long as the book/story doesn't have woke nonsense. In that sense, I guess older novels would be the best bet.
EDIT - Holy moly, thanks for all of the suggestions. I have my work cut out for me, looking into all these authors this summer.
The John Dies at the End series (David Wong) was suitably fucked up and fun to read. I'll add the disclaimer that I haven't picked up the 4th and most recent yet but the other 3 were all original, at least.
Do not watch the movie if you haven't already. The budget simply wasn't enough to cover the breadth of the book and it doesn't hold up well.