DF: The Gods of Chaos (Melnibone)

Tons of stuff in various Chaosium game books, or from the Moorcock novels (for example; the swords/Corum books go with Arioch, Xiombarge & Malberode the faceless (King of swords as the main 3 lord of chaos antagonists)

As a brief cut & paste from Wiki:
"
Arioch, Lord of the Seven Darks, Knight of the Swords, Lord of the Higher Hell, et cetera, one of the most powerful Dukes of Hell. He is the patron of Melniboné and has a personal relationship with Elric, who was the first emperor to summon him to the plane of Earth in a long time. He is sophisticated and highly intelligent, and he usually appears in an amazingly beautiful form, usually with blond hair.

In the short story Elric at the end of time, Elric travels to the far future; "The End of Time" where he recognises one of the inhabitants there Lord Jagged as Arioch (see The Dancers at the End of Time).

Balan the Grim or Balaan appears briefly as an ally of Arioch.
Balarizaaf, Archduke, Chaos Lord trapped on the plane of Alptroomensheem (the Nightmare Marches).
Chardros the Reaper, one of the three oldest Chaos Lords, appears similar to the Grim Reaper. He is referred to as both the lord of destruction and beauty.
Checkalakh the Burning God, a minor Chaos Lord made entirely of fire, was once summoned to Nadsokor to burn disease from the city. Like his essence, he is constantly hungry.
Duke Teer in perpetual search for more blood for his castle ('can you not smell its delicious tang?')
Eequor, a Lady of Chaos, dwelling in a half-world filled with shades of blue.
Hionhurn the Executioner, a giant, green and gnarled like a tree.
Mabelode the Faceless is one of the three oldest and most powerful Chaos Lords. He appears with his face in shadow.
Malak appears briefly as an ally of Arioch.
Mashabak is a rival to Arioch in The Revenge of the Rose. Count Mashabak is brutal and direct, less subtle than Arioch.
Narjhan, a rider in black armour whose voice echoes hollowly in his helm, who leads a force of beggars from Nadsokor against Tanelorn.
Orunlu the Keeper is a purple-scaled giant with a fiery aura. This good-humoured Chaos Lord is charged with guarding the Dead Gods’ Book.
Pyaray, the Tentacled Whisperer of Impossible Secrets, appears as a giant red octopus. His soul is kept in a blue crystal on his head. Sailors who drown at sea are taken into his Chaos Fleet. One portent of the end of the world is the ascent of the Chaos Fleet to the surface.
Slortar the Old, the oldest Chaos Lord, appears ironically as a slim and beautiful youth.
Vezhan appears as a smoky yellow, winged humanoid; at one time he was a patron of Rackhir, a Warrior Priest of Phum.
Xiombarg prefers to appear as a beautiful young woman but is sometimes referred to with the male pronoun (making a pun of her title Queen of the Swords). She is prone to shapeshifting and carries a giant sword. In Stormbringer, she rides a creature with the head of a lion and the body of a bull (chimeras are typical creations of Chaos).

Other Chaos Lords are mentioned by name only; these include Aesma, Alastor, six-breasted Arnara, Haborym of the Fires Which Destroy, Malohin, Marthim (Balaan-Marthim), Nizilfkm, Saebos, Teshwan, Verdelet, and Zhortra.

Balo, the Jester to the Court of Chaos, is able to move at will between the realms of Chaos and Law because he is not exactly a Chaos Lord. His function at court is to amuse and baffle the Lords of the Higher Worlds. At one point, he tries to convert Earth into his own Realm of Paradox.