There are over 94,000 (!!) Supernatural stories on fanfiction.net. That's not even counting the crossover fandoms. Some stories aren't very good-you have to keep looking but there are so many fantastic stories of Dean & Sam & family. Also S.E Hinton is an anonymous Supernatural author on this site.
The Boys of Baker Street by Skyfullofstars. "As John Watson struggles with the after math of his kidnapping, shooting and forced drug abuse, Sherlock goes after those who would continue to harm the man he loves. Mycroft deals with a very real threat to his brother and the Government he has sworn to protect. Sequel to THERE BUT FOR THE GRACE OF JOHN WATSON." Rated: M - Hurt/Comfort/Angst - John W. & Sherlock H. http://www.fanfiction.net/s/7685420/1/The-Boys-of-Baker-Street
Jacob and Renesmee - Night and Day - Twilight Saga Fanfic of the continuation of Jacob and Renesmee starting seven years after Breaking Dawn. https://www.fanfiction.net/s/11983810/1/Jacob-and-Renesmee-Night-and-Day-Twilight-Saga