A few more mysterious oddjobs like Haldor would fit in i think (Swamp Lady? Smart Werewolf? Fuling Outcast?), but adding things like populated neutral villages would kind of diminish the tone of the game imho.
Valheim is a long- abandoned world, forgotten by mortals and most of the gods. You are like the loneliest human in the universe.

Seeing a bunch of civilians would feel as if chevy chase and his family rolled by in their ford wagon…