In Kyon: Big Damn Hero, Kyon has had Ship Tease with every female character he's not related to. And one of his cousins, though that's one-sided. To be fair, though, he has that in canon, too.
In Forward, there are a number of scenes that tease River/Jayne. The author does, however, twist these around quite a bit, and one of the most tense moments between the two is ruined by a realization that psychic mind-manipulation was involved.
The writer of You Got HaruhiRolled! has some fun with this. He is believed to be the first person to ship Fujiwara/Kuyou, and has since turned it into a Running Gag that the pairing is very much one-sided. Chapter 84 is devoted to the Anti-SOS Brigade and deliberately has a lot of moments where Kuyou is affectionate towards Fujiwara. Fujiwara, who regards Kuyou as an Abhorrent Admirer at best and a rapist at worst, promptly Breaks The Fourth Wall and implores the author to stop it.
He has also parodied the concept when Kyon becomes a pervert and starts propositioning every female character in the show, as well as some of the men. They all give him a slap in the face.
The Touhou fanfiction Imperfect Metamorphosis has no pairings whatsoever but nonetheless manages quite a bit of teasing, including offhand comments, speculation by other characters, ambiguous, highly emotional scenes, and anything to do with Yuuka
The fanfiction stories based on the original 1987 TMNT cartoon written by FF.net author Zarius tease the fanon pairings of Donatello/Irma and Leonardo/Lotus, and tries it's luck at a unique pairing by hinting at April/Michelangelo.
