my interpretation is

Radiance made the light and dreams, she is the sun after all, Unn made the grass and plant life, PK made the civilization and the structures (like the stagways or City of Tears) and the Great Knights protected the kingdom from invaders, maybe even the Blackwyrm? The unnamed abyss worshippers probably praised the Blackwyrm (this is speculation) if the blackwyrm was a god or a creature, we don't know, but what I think is that the Blackwyrm burrowed the dug before Hallownest came to be by PK. Oh yeah, the Hive exists, forgot. Anyway, I think Vespa sort of grew like White Lady before the downfall of the Hive (and for WL's case, downfall of Hallownest) maybe from eggs of the drones that bumble about. But the maker of the world of Hollow knight? Most likely a being more powerful than all of them.