I couldn't decide on only 5 authors I'm sorry haha I haven't put this in a specific order. I can rank stories but I WON'T compare authors, they're all great in their own ways. Anyway, this is my top 10: 

- Cori573 : I love how different each of their stories are :)

- Buzuki : They're just a classic in moonsun fanfic's universe. Recently they have come back with another story, so you should check that :D

- givemevodka: I don't care that they only had one incomplete fic, I have lost the count of how many times I've read that fanfic hahaha. Finalmente will be always one of my favourite fics.

- byuntae-sica : in the dark eternity is a fanfic that made my heart ache so much. It left me speechless.

- Saluhmander : Well, GBJB is slowly becoming one of the most important moonsun fanfics in my opinion. This author has evolved so much with time: theis story is just amazing  (I think I've run out of compliments with this novel).

- Carolsama1993 : Uf, I love their fanfics SO much.

- tftmtrise :I've been following them since their first fic and they've improved SO much. They now give good fic after good fic; so don't forget to check their new story ;)

- fireroasted : Archangel Island is THE moonsun fanfic. I love how it's written.

- fluffsaur : Not only did they write Everything and Nothing (I feel like that's the most fampus moonsun fanfic out there) that they also wrote Save Me From Myself, a masterpiece.

- Light04 : I cross my fingers hoping 'The Eclipse' will be finished some day. Truly amazing.

BONUS

- Hwabyul : I love ALL of their stories, like seriously. They have such a "mature" way of writing. 

((Also,I can't forget to mention my two favourite authors from wattpad and AO3: StrangerThanDiction and zucchinis (bc_bread)))