Sherlock Holmes Fic Finding Community

I second both recs by fitofpique, there is a Mycroft/Lestrade (Inspector) tag on AO3 which contains a lot of good fics. The authors I subscribe to include blooms84, earlgreytea68, marmosette, nicKnack22, Eva and nickelsandcoats among others. You should be able to see my bookmarks on there (same user name), there are a few of the more memorable fics, although I tend to only bookmark fics by authors that aren't prolific Mystrade shippers.