From the color palette used I am guessing they are done by the same person !! Some similar strokes there !! Chances are if they came from Goodwill,, they are local to the area !! Either the artist died, didn`t like these or is spring cleaning and donated them !! I didn`t see anything that would even give a guess at who the artist was !! Whoever it was seemed to be into surreal art !! If you have a gallery or hobby shop close,, they might tell you who does this kind of work !!