So I was tagged to do this by YudaiMatsuro so here goes this should be fun

United Sanctuary

Royal Paladin: Asuna (Sword Art Online)

Gold Paladin: Heathcliff (Sword Art Online)

Shadow Paladin: Kazuto Kirigaya (Sword Art Online)

Genesis: Skuld (Ah My Goddess) I went with this choice because 

Oracle Think Tank: Ishizu Ishtar (Yu-Gi-Oh)

Angel Feather: Kanade Tachibana (Angel Beats)

Dragon Empire

Kagēro: Natsu Igneel (Fairy Tail)

Narukami: Killua Zoldyck (Hunter x Hunter)

Murakumo: Zanya Kisaragi (Future Card Buddyfight)

Nubatama: Naruto Uzumaki (Naruto)

Tachikaze: Rex Owen (Dinosaur King)

Dark Zone

Dark Irregular: Ken Kaneki (Tokyo Ghoul)

Gear Chronicle: Fei Rune (Inazuma Eleven) mostly because....time travel XD

Pale Moon: Joker/Drossel Keins (Black Butler)

Spike Brothers: Jake Mallory

Zoo

Great Nature: Miko (No Game, No Life)

Megacolony: Viola (Pokemon)

Neo Nectar: Erika (Pokemon)

Magallancia

Aqua Force: Roy Mustang (Fullmetal Alchemist) my reasoning for this one is he's a colonel...nothing more

Granblue: Monkey D. Luffy (One Piece)

Bermuda Triangle: Hanako Koizumi (Love Live) because Idols XD

Star Gate

Dimension Police: Omega Xis (Megaman Star Force)

Link Joker: Freeza (Dragon Ball Z) 

Nova Grappler: Astro (Astro Boy) because he's a humanoid robot....thats all I got

Well there's my choices for characters that would best represent a vanguard clan, some of my examples probably aren't the best but I had fun doing these ones regardless. Well with that lets all continue to live in this golden age.