The Demons and Angels of Primordial have known to be the Strongest Creatures in the Warp as it Took the 3 Chaos gods to Imprison the Primordial Through Trickery of Tzeach and Imprison the 2 Realms of Chaos and Order that have Created by the Primordial

Even then the Newly Born Slaanesh Tried to Seduce the Greatest among their Numbers only to be Rejected and Thrown Out in their Realm She/He/It Tried to Invade them only to be Driven Back in Fear due to some of them have the Power to kill Demons Permanently 

These 2 Realms are Massive as Each one of them are Larger than the 4 or 5 Combined (If you Count Malal of course) Realms of Chaos gods and have even Vaster Number of Demons and Angels at their Side even during at their Most Powerful None of them could even Made Foothold towards the 2 Realms due to their Power and Hatred against them

The Ancient Primordial is a

Chaos god of Rage, Warp, Apocalypse, War, Damnation, Hate, Destruction, Wrath, Vengeance, Insanity, Madness Power, Strength, Anarchy, Annihilation, Desolation, Emptiness, Fear, Unknown, Absolution, Calamity, Betrayal, Corruption, Darkness, End, Oblivion, Void, Terror, Evil, Domination, Genocide, Horror, Malevolence, Misery, Pain, Sadism, Suffering, Terror, Torment, Torture, Ruination,

he is also Order god of, Warfare, Justice, Smith, Valor, Strategy, Endurance, Destiny, Extintion, Honor, Might, Eternity, Courage, Good, Hope, Stars, Change, Adopt, civilization, Determination, Crusade, Enlightenment, Redemption, Heroism, Selfless, Afterlife, Tactics, Peace, Space, Cosmos, Psychic, Technology, Retribution, Day, Night, and Light

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Chaos Demons

Lesser Demons: 

Greater Demon

Demonic Titan

Demon Prince

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Order 

Angel Warrior

Angel Lord

Thunder Warrior Saints and Champions