There’s a MASSIVE list of credits here. Please let me know if there’s any I missed. I’m pretty confident I got them all, but please let me know.

Stephen Challener: Xeon (also OGA-BY 3.0)
https://opengameart.org/content/four-characters-my-lpc-entries
Thane Brimhall (pennomi) and Laetissima: Nerd/Secretary Glasses, Shades, Monocle, Small Eyepatch (all CC-BY-SA 3.0 and GPL 3.0 only)

DCSS Authors (CC0): Original Plumage Centurion
http://opengameart.org/content/dungeon-crawl-32x32-tiles

Fabsy: Original Bandana (from The Revolution)
https://opengameart.org/content/the-revolution-hair

thecilekli: Hijab (CC0)
https://opengameart.org/content/lpc-hijab

DarkwallLKE and Charles Sanchez (CharlsGabriel): Crown (CC-BY-SA and GPL 3.0 only)
https://opengameart.org/content/lpc-crown

Luke Mehl: Tiara (from Female Mage Clothing Set, CC-BY-SA and GPL 3.0 only)
https://opengameart.org/content/female-mage-clothing-set

Johanes Sjolund (Wulax): Hood, Feather Cap, Armet Helmet, Kettle Helmet, Chainmail Hood
https://opengameart.org/content/lpc-medieval-fantasy-character-sprites

Shawn Williams: Horned Helmet (based on Armet; also CC-BY 3.0)
https://opengameart.org/content/lpc-full-plate-golden-armor-0

Nilla122 (all OGA-BY 3.0): Mask (Light and Dark), Tied Headband, Sackcloth Hood, Kerchief
https://opengameart.org/content/lpc-lizard-headgear
Legion Helmet
https://opengameart.org/content/lpc-roman-armor

ElizaWy: Bascinet Round (not included here, it was already included in the prior release)

Bluecarrot16:
    • https://opengameart.org/content/lpc-pirates
        • Earrings
        • Pirate Eyepatch, Pirate Bandana (derived from Fabsy’s The Revolution Bandana), Pir
    • https://opengameart.org/content/lpc-santa
        • Christmas Elf Hat, Santa Hat
    • https://opengameart.org/content/lpc-gentleman
        • Round Glasses and Sunglasses (Derived From Monocle)
        • Bowler Hat, Tophat (CC-BY-SA and GPL 3.0 only)
    • https://opengameart.org/content/lpc-helmets-mega-pack
        • https://opengameart.org/content/lpc-helmets
        • Helmets made to contain consistent colors, along with split accessories and visors into separate assets.
        • Armet & Armet Simple, Kettle (also OGA-BY 3.0)
            • Cleaned up version of Wulax’s helmets.
        • Bascinet, Bascinet Pigface, Bascinet Round (also OGA-BY 3.0)
            • Derived from ElizaWy’s Bascinet
        • Barbarian: Basic, Nasal and Viking (also OGA-BY 3.0, CC-BY 3.0+)
        • Barbuta: Basic and Simple (also OGA-BY 3.0)
        • Close, Flattop, Greathelm (also OGA-BY 3.0, CC-BY 3.0+)
        • Maximus, Nasal, Pointed (also OGA-BY 3.0, CC-BY 3.0+)
        • Spangenhelm +Viking and Sugarloaf +Simple (also OGA-BY 3.0, CC-BY 3.0+)
        • Horned Helmet (CC-BY-SA 3.0 and GPL 3.0 only)
        • Helmet Crest, Helmet Horns (OGA-BY 3.0)
        • Centurion Crest and Plumage, Helmet Wings (based on DCSS Assets, CC0)
        • Legion Plumage (mapped to all frames; CC-BY-SA 3.0 and GPL 3.0 only)
        • Grated Visor (also OGA-BY 3.0 and CC-BY 3.0+)
            • Separated from Armet by Wulax
        • Pigface & Round Open and Raised Visors (also OGA-BY 3.0)
            • Visor Separated from ElizaWy’s Bascinet
        • Slit Visor (also OGA-BY 3.0)
        • Horned Visor (based on Shaun Williams Horned Helmet; also CC-BY 3.0)