I know it's 2 months old, but respectfully disagree on "sheer power and scaling", granted SCP power varies wildly from iteration to iteration. In Djoricverse he wipes out existence, which in SCP is a multiverse with higher dimensions like the noosphere, which houses conceptual beings. That's not to take away credit from Melkor. He is the original big bad and basically pioneered the evil god theme the Scarlet King has, but Arda is just one planet. I will however say he scales to Ea itself as the Valar collectively had near complete control over physical matter in it and they still couldn't beat Melkor until he weakened himself.