Neither is objectively better, as it depends entirely on reader preference:
In the realm of harem fantasy, the question of whether a "good" or "evil" protagonist is better suited to save the world depends heavily on the reader's appetite for classic heroism versus transgressive power fantasies. While the 2024 game Harem Fantasy: Good or Evil Will Save the World harem fantasy good or evil will save the world better
Look at the most successful "save the world" harems in fiction: Neither is objectively better, as it depends entirely
The harem is built on mutual respect and shared ideals. Saving the world feels like a collective triumph of the human spirit. Neither is objectively better