Have you checked out Super Luigi and the Marvelous Compass yet?
Supper Mario Broth brings Luigi’s adventures in the Waffle Kingdom from Paper Mario: The Thousand-Year Door to life in comic form! Join Luigi and his friends on an adventure that’s got giant snakes, supercharged kart racing, theatrical intrigue, loads of pastry, and much, much more.
Start reading here, or check out the comic archive. There’s also the PDF of the Prologue and Chapter 1 of the comic if you want a taste.
Super Luigi and the Marvelous Compass updates weekly with new pages.
I guess this amounts to fanfic, which I’m not really into, but this comic is super well-done, with great fanservice and scenarios that fit right into the Mario world. Plus it’s just building off the backbone of an existing story anyway, namely Luigi’s tall tales in Paper Mario 2, and adding tons of detail. The art is really unique and interesting and the author is very thoughtful and dedicated. Read the comic and give him some feedback!