Warning: Tentacles

This also works well when searching for gen fics! :) If you search Teen Wolf gen ordered by kudos, you get a lot of fics marked Derek/Stiles (some of which are gen - to confuse things further - but many are romance). I use the separate advanced search page more often than the right hand column search, but if you put -"Derek Hale/Stiles Stilinski" in the first field (called "Any Field") at the top, and search Teen Wolf gen ordered by kudos, you actually get almost all gen.
Compare:
Teen Wolf gen by kudos list
Teen Wolf gen by kudos -"Derek Hale/Stiles Stilinski" list