Even though the Sword Logic was false Oryx demands some respect for establishing himself as the better amongst his siblings and believing in it so strongly that he could believe that perhaps he wasn’t a part of the Final Shape and just a stepping stone for those who were. Ironically he managed to do what the Precursors failed to do. Savathûn has always been a character motivated by selfishness while Xivu has been overly emotional. Eris is more than the Hive persona.

Savathun hive god of trolling.

Oryx is unironically the most powerful and strongest of the Osmium Dynasty and pretty much all the Hive. Eris needed the Guardians and she cheated her way to power by spawn-killing Savathun.

Eris is one of the coolest characters in the game, so definitely her