Sayoung - Boss of Shadow Labyrinth
Rocket Man - Boss of Odessa Streets
The Atlas, Goliath and Titan - Boss of Scoria Core
Not a boss.. in dfo, or atleast not yet but.. also got it from DFOSource.
Bhan Empire Sword Master
Aganzo Weapon Master - Side-boss of Moonlight Tavern
Bwanga Bludgeon Weapon Master - Boss of Bwanga's Camp
Not a boss either, it's actually Saya apperantly when she was alive.