Keldryn
Adventurer
I think that the original class names in AD&D and B/X D&D were the most generic:
Fighter (one who fights)
Magic-User (one who uses magic)
Cleric (ordained member of a church)
Thief (one skilled in sneaking, stealing, and defeating locks & traps)
The level titles added flavor to these generic class names:
Fighter: Veteran, Warrior, Swordsman, etc, until Lord at 9th level
Magic-User: Prestidigitator, Evoker, Conjurer, etc, until Wizard at 11th level
Cleric: Acolyte, Adept, Priest, etc, until High Priest at 9th level
Thief: Rogue, Footpad, Cutpurse, etc, until Master Thief at 10th level
"Fighter" and "Magic-User" are more generic than "Cleric" or "Thief," but I'm hard-pressed to come up with more generic names for those archetypes.
Fighter (one who fights)
Magic-User (one who uses magic)
Cleric (ordained member of a church)
Thief (one skilled in sneaking, stealing, and defeating locks & traps)
The level titles added flavor to these generic class names:
Fighter: Veteran, Warrior, Swordsman, etc, until Lord at 9th level
Magic-User: Prestidigitator, Evoker, Conjurer, etc, until Wizard at 11th level
Cleric: Acolyte, Adept, Priest, etc, until High Priest at 9th level
Thief: Rogue, Footpad, Cutpurse, etc, until Master Thief at 10th level
"Fighter" and "Magic-User" are more generic than "Cleric" or "Thief," but I'm hard-pressed to come up with more generic names for those archetypes.