Who Would Win?

Him

Avenger, savior of worlds

Cosmic Energy Manipulation, Superhuman Strength, Flight, Energy Blasts, Regenerative Cocoon, Quantum Magic

Soul Gem, Karmic Staff

Infinity Watch, (as the Magus) head of Universal Church of Truth in an alternate future

Arthur Curry

King of Atlantis

Super Strength, Super Speed, Agility, Stamina, Invulnerability, Telepathy, Intellect, Teleport, Radar Sense, Healing, Weapon Master, Super Sight, Super Hearing, Insanely Rich, Unarmed Combat, Electricity Control, Ice Control, Sub-Mariner, Tracking, Adaptive, Swordsmanship, Animal Control, Power Item, Water Control, Leadership, Longevity

Trident of Neptune, Atlantean armor, Water Hand

All-Star Squadron, Aquaman and Aqualad, Aquaman/Green Arrow, Atlanteans, Atlantis Royal Family, Beast-People, Black Lantern Corps, Crime Syndicate of America, Homo Magi, Insurgency, Just'a Lotta Animals, Justice Arcana, Justice Guild, Justice Incarnate, Justice League Blue, Justice League Europe, Justice League Infinite, Justice League International, Justice League of America, Justice League of Atlantis, Justice League Task Force, Justice League Unlimited, Justice Society International, Mystery Analysts, New Reichsmen, One-Earth Regime, Parliament of Waves, Red Lantern Corps, Sea Gods of the World, Special Forces, Super Friends, Super Powers, The Others, Timelost, United Nations, White Lantern Corps