Original Powers is a really good one and is complete. The storyline is fantastic! I highly recommend this one because the plot is just so good! It’s long but I couldn’t stop reading it.
AU post 3×11. Rumplestiltskin’s curse breaks when he stabs Pan, but when one darkness falls, another rises. Enter the Black Fairy as the power behind the Witch. This is the price to be paid—war in the Enchanted Forest that our heroes may not be able to win. Now Rumplestiltskin must play a dangerous game where the rules keep changing…and nothing will ever be the same again.
https://www.fanfiction.net/s/9986424/1/Original-Powers
Courage of the Stars is a good one as well (complete too) but it is heavy SF. However, the whole premise of it is interesting. It is centered quite a bit around Neal/Bae so if you don’t like him you may not want to read this one. But it does put a different spin on some previous events it toys with time travel but not quite. And Cora is a major bad guy in this one, so if you are interested in that, I would look into this one.
If there’s one trait Baelfire shares with his late father, it’s that he’s willing to do anything to get back to his family, even dabble in some of the darkest of spells and bending the laws of magic. AU to Quiet Minds.
https://www.fanfiction.net/s/10522416/1/Courage-of-the-Stars
Gold’s Eleven is an interesting spin on Ocean’s Eleven but is heavy on Neal and Gold and is not too nice to Hook and Regina is the big bad of this story, so be warned.
Recently released from prison, Danny Gold has a plan to strike it rich, get his revenge and win back his true love. But in order to pull it off, he’ll need a crew as crazy as he is! Contains all your favorite characters! Complete
https://www.fanfiction.net/s/8710669/1/Gold-s-Eleven
A really good SF one is by our own DSB called Bent.
A while back, when discussing the Emma/Neal dynamic, Once’s writers posed the question, “…how do two people who love each other come together when there’s so much hurt?” This story is my take on a possible answer, set post-322. Complete
https://www.fanfiction.net/s/10479827/1/Bent
And three that are not complete but in progress that I am currently really enjoying…
https://www.fanfiction.net/s/10815181/1/This-Unfamiliar-Road
What if Rumplestiltskin was able to subvert the curse… for a price? In exchange, he could have the power to arrange the marriage of Princess Emma and get his son back all in one fell swoop. And if he happened to decide his own son is the one the princess should marry, then all the better. The only question remaining is this: could this marriage of convenience become something more? AU.
https://www.fanfiction.net/s/10762619/1/Where-Nightmares-and-Darkness-Meet
One month after Rumple and Belle are married nightmares begin to plague Storybrooke. Henry sees it as an opportunity to grow closer to his grandfather while they search for answers, but they may find that even nightmares can have dangerous outcomes when mixed with powerful blood magic, especially when they find their enemy is using the blood of someone they thought they’d lost. AU.
https://www.fanfiction.net/s/10665763/1/Freeze-on-the-Stones
One choice can change fate. Regina chooses love, Snow stays silent, and Cora casts the curse. Rumplestiltskin knows that trusting Cora with that much power is dangerous—but he has no choice. 28 years later, Gold and Regina awaken in Storybrooke and must work together to make the Savior believe. AU. This Storybrooke and its backstory are [much] darker than the one you know. Ensemble fic.
"We were happy."
"Because... it was born out of true love."