I just realized why comic Eddie and his Other are the best match.
According to the 2018 comic, the symbiotes are a race born from the void, they were made to kill and destroy, but they ended up wanting to be closer to the light. It’s just like Eddie, who was in a very dark place, have done many terrible things, but part of him still want to do good. A hero may influence a symbiote with their light, but they can’t fully understand a creature of darkness, only Eddie, who’s been there, done that can truely embrace the conflict of a symbiote (even though it took him years lmao)