Terry Pratchett.

I always get Pratchett and Brooks confused. Too many Terrys.

All my life these are some of the only ones that make me laugh out loud consistently while still having a great plot, characters, and just overall excellent writing in so many ways.

He does a great job of writing a series that can be read piecemeal but pays off if you go through the whole things.

I'm also a big fan of the Myth Adventure series by Robert Aspirin. It's more comedic, but has a similar vibe.