Which Greek god or goddess has the most control over the land?

Not sure what do you mean by control. But Γαῖα / Gaia is the personification of the Earth (Mother Earth) she is also mother of the Titans. So I guess mother earth or Gaia for this instance has all control over land / earth. read more

First of all, Erebus is the Greek god of the primeval darkness. Achlys is the Greek god of the mist of death, not mist. It means that Achlys is the guardian-keeper of the state of passing into lifelessness, he is more like the Grim Reaper, whose visitation means death. Hecate, is the Greek goddess of witchcraft. Nyx, is the Greek goddess of the night. read more

A temple would house the statue of a god or goddess, or multiple deities, and might be decorated with relief scenes depicting myths. Divine images were common on coins. Drinking cups and other vessels were painted with scenes from Greek myths. read more