Not that easy:
We never see Cardinal Draclau in combat but I assume he's a Cardinal.
Queklain is an Impure King.
Weisgraf is a White Knight.
Velius is a Warlock.
Elmdor is an Arc Knight.
Zalera is the Angel of Death.
Dycedarg is a Lune Knight.
Aldramelk is the Ghost of Fury I think.
Vormav is a Divine Knight.
Hashmallum is a Regulator.
Alma is a Cleric.
Altima is a Holy Angel/Arch Angel
Elidibs is some kind of high-level Wizard, but we never fight him directly.
Serpentarius is...um, Serpentarius.