Cleric (Divine caster -Cleric spell list, "deity's domain" powers, any armor and limited weapons)
--Druid ("Natural" caster -Druid spell list, "natural world" powers, soft armor, limited weapons)
--Shaman ("Primal" caster -Shaman spell list spells duplicate Divine and Arcane effects, "spirit world" powers, soft armor, limited weapons)
Fighter (any armor, any weapons, weapon mastery/specialization, combat-based abilities/powers)
--Barbarian ("Primal" flavored marital class, light armor, any weapons, Primal-based abilities/powers +outdoor/tracking/survival skills)
--Paladin (Divine flavored martial class, any armor, any weapons, Divine-based "Paladinic" abilities/powers, no spell-use!)
--Ranger (Nature flavored martial class, any armor, any weapons, bow specialization, Nature-based abilities/powers +outdoor/tracking/survival skills, no spell use!)
Mage (Arcane spell caster -Mage Spell List, no armor, limited weapons)
--Specialist Mage (Arcane caster with increased spell ability in Specialty School, Speciality-based powers, no armor, limited weapons)
--Thaumaturge (Divine-flavored Mage, "dual casting"-access to Divine/Cleric and Arcane/Mage spell effects, ritual casting/specialist, no armor, limited weapons)
Rogue (light armor, any weapon,"Thieves' Abilities"/skills)
--Bard (Nature-flavored Rogue, light armor, any weapon, certain Thieves' Abilities, Bardic Lore, "Nature"-based spell caster -Bardic Spell List combining certain Divine, Druid/Natural and Illusion spell effects)
--Monk (Divine-flavored Rogue, no armor, limited weapons, unarmed combat specialist, certain Thieves' Abilities, Monk abilities/powers)
Well, overshot 11 classes by a titch. But this list (more or less) has served me and my game world setting well for some time now. Just about anything else is all just a matter of mixing and matching access to specific skills, spells or "powers".
An Assassin or Swashbuckler are easily done with expanded Thieves' Ability lists (Poison use, spying, disguise, acrobatics, etc...), but the character's Class is still a "Rogue." Whereas Paladins, Barbarians and Rangers I do think are different enough in flavor and archetype from a "Fighter" to warrant being considered their own Class.