Most obscure one i can think of, is Haibane Renmei.
Basically about a walled in... country? Where these girls who lost their memories are in limbo, have wing and a halo so are akin to angels with halos and wings. They either succumb to their failures/nightmares and sins, or they turn into birds and fly away. Meanwhile they are basically normal girls working and living and being part of a small town environment.
The series is very slow. So it's not going to be part of the action/adventure boy crowd usual.