Who are some of the best comic sci-fi writers?

We all know Douglas Adams. Scalzi likes to have fun, the Bobiverse series is not exactly my type of humor but I thought they were pretty fun books.

I've been reading a lot of Carl Hiassen and Elmore Leonard lately, guys who write semi-comedic crime novels about anti-heroes bungling about in the underbelly of society, with lots of kooky characters and political corruption.

Are there any writers like that who work in the Sci-Fi genre? Say, more straight-faced than Adams but still funny?