When I first saw your request, I figured it would be relatively easy - but was shocked that most of them from the last two years are basically lengthy one-shots (or other fandoms/pairings)! However, I have a few:
Revolution by Pensierri32 (Rated M, no YIMs) falls right on the edge of the completed time bracket, so you may have read it already.
Pale Morrigain by OnyxIvyStone (Rated MA, no YIMs) is another story that was started quite a while ago, but completed within the last two years. AU, with a nice blend of Japanese and Irish folklore. Most of OnyxIvyStone's stories are much older, but they are brilliantly written and worth a re-read, if you haven't read them already.
Pack Instincts by witchenmoon1 (Rated T on FF.N) was my summer camping trip reading.
Convivial by The Hatter Theory (Rated M, no YIMs), which I just finished reading this weekend. It had me in tears more than once, but I wasn't sobbing at the end the way I had expected to be
While I tend to assume that
everyone is reading my list of "the usual suspects," I know in reality that not everyone is, and so...
Danyealle-sama has Standing Outside the Fire and Kryponite both completed within the last two years. Everything she writes is MA.
While
SunsetMiko's stories have drabbleish chapters, she's got quite a few recently completed including The Syndrome, Sneaking a Peak, On the Outside, and The Snow Angel. Again, everything is MA.
Lisa had quite a few stories that I love. All MA. Three of the stories are longer: The Whim of Fate (which had a plot twist I
never saw coming), How We Grow, and War for the World. Sadly, I don't see her stories get recommended nearly enough.
Happy Reading!