i don't have any favorite authors in general but a couple of fics i really like:

try my luck by veniyuri
going magazine by jado_cheodo
life's just another rom-com by wonsteapot
we are not ghost hunters, we're vloggers by seoktothegyu
i want us to eat well by sunwalker
the act of falling by eojeonna
king of baking, kim mingyu by yoonbot
175C for 60 minutes by geguri

i hope we get more long fics!!!