I really liked 'Labyrinth of the Sith'. In this fanfiction, the Sith are using a hidden labyrinth on an ancient planet as a training ground. It has a lot of action and shows a different side of the Sith. It also ties in elements from the original Star Wars movies, like the use of lightsabers in the tight corridors of the labyrinth.
One great Labyrinth Star Wars fanfiction is 'The Jedi's Labyrinthine Quest'. It combines the mystery of the labyrinth with the epic space battles of Star Wars. The author does a great job of creating new characters that fit seamlessly into the Star Wars universe while exploring uncharted areas of the galaxy that are like labyrinths filled with danger and discovery.
There's also 'A Labyrinthine Adventure in the Star Wars Galaxy'. This one focuses more on a group of young Jedi trainees who find themselves lost in a strange, maze - like structure in a far - off system. It's an interesting read as it shows their growth and how they use the Force to navigate through the challenges of the labyrinth.