Out of the 56 source books including the Bestiary 1-4 and the Adventure Paths, 20 creatures are a match when one look for entries with the "Shadow Plane" environment. And out of those 20, none is any alignment of good.

The Bestiary 6 is about Evil creatures, so you're not likely to find anything fitting your criterias there.

The Bestiary 5 looks promising, though nor focused on the Shadow Plane or good aligned creatures, but I've yet to find any that is both dwelling there and solely Good aligned.

My personal hunch is that you're out of luck and while the Shadow Plane is not inherently evil, it was not intended as a fun place for vacations when it was designed and is since filled mostly by monsters.

Out of the 56 source books including the Bestiary 1-4 and the Adventure Paths, 20 creatures are a match when one look for entries with the "Shadow Plane" environment. And out of those 20, none is any alignment of good.

The Bestiary 6 is about Evil creatures, so you're not likely to find anything fitting your criterias there.

The Bestiary 5 looked promising, but after skimming through the 300 creatures in there, I found none that is Good and living in the Shadow Plane.

My personal hunch is that you're out of luck and while the Shadow Plane is not inherently evil, it was not intended as a fun place for vacations when it was designed and is since filled mostly by monsters.

What Isaac pointed is true, you will find Good aligned individuals, but there is no source of a definitely good race/species from there.