by Eakin is one of my all time favorites. It's a Live, Die, Repeat
-style story that does a great job examining the consequences of a time loop. While it occassionally gets dark, it never relies on grimdark and canon defilement, and is peppered with a lot of funny and triumphant moments. It has two sequels that are very different stories but are also very good.
In Naked Singularity
by Cold in Gardez, Twilight attempts to write a romance story while her friends struggle to give her constructive criticism. It's as funny as it sounds, but it's also such a tightly written story that it feels like a plot that wouldn't be out of place in an animated sitcom like Golden Age Simpsons.