I have been exploring the characters who will appear in the first two panels, things are starting to make sense, and am thinking of individuals to seem to embody different attitudes/ ways of being.
Alfred Hitchcock, Carl Jung, Jeff Buckley, St Francis of Assisi. The female figure behind Jung seems like she will become a generalised character rather than specific individual (like the cavemen). Perhaps some sort of Pagan goddess - perhaps an overseeing muse.
However, still tossing up whether referencing specific people is a good idea...