I can't see M.R. James getting this kind of treatment any time soon. But all credit to the weird fiction fans of America - and beyond - who've got behind this project.
Inscriptions don't seem to be fashionable in these post-literate times, but perhaps exceptions can be made for statues of writers? Anyway, I'd suggest the following, from 'Alone':
From childhood's hour I have not been
As others were; I have not seen
As others saw; I could not bring
My passions from a common spring.