Some of my favorites, none of which have spoilers for S2, I believe, and most of which are not super canon based, while still being set in the TV universe:

-The Crown of the Summer Court by astolat. It has elves.
-Past Imperfect by the Hoyden. Merlin has an accident with time.
-The Knights Have a Thousand Eyes by stakeaclaim. Long and plotty and full of mostly OC but awesome knights.

I also have a several futurefics I can rec, if that's your thing, as well as some modern day a/u fics.

I also tend to hit up this when I need new Merlin fic, as it is a long list of rec lists.