On my solo trips, I have stayed at AS Sports, OKW, BWV, and AKL (just cameback). AKL is a good bet for a solo traveler, as there is plenty to do and see around the resort. In addition it is a "secure" resort, which means vehicles not belonging to WDW or resort guests are not allowed on the resort property (no pool hopping allowed at this pool). Non-AKL guests can still access the resort via Disney Transportation.
I have never not felt safe at any Disney Resort. They seem to always take the extra effort to ensure the safety of their guests.