What is your Six Classes?
STRENGTH: Knight: strong, tanky, only class to get full melee/armour proficiencies, battle maneuvres, gets more basic skill proficiencies but lacks expertise of specialists.
DEXTERITY: Ranger: stealthy, maneuverable, expertise in dungeoneering/exploring/tracking type skills, slightly frail for a melee class, sneak attack is powerful but melee only vs 'safe' ranged damage.
CONSTITUTION: Sorcerer: this is the magic blaster class not the wizard, but casting has more of a physical toll, you make successful CON checks to cast, or something similar, expertise in arcana but otherwise only a few basic level skill proficiencies.
INTELLIGENCE: Wizard: the magic utility toolbox, expertise in knowledge skills, low offensive capabilties(as in only has cantrip offensive spells)
WISDOM: Cleric: healing, support and buff spells, tanky/armoured but mediocre offensives apart from divine smite and anti-undead/demonic/ect radiant damage, expertise in religion and medicine skills.
CHARISMA: Rogue: expertise in social and slight-of-hand pickpocket skills, bonus skill expertises to freely assign, gets bardic inspiration and the warlord martial support abilities as well as field control traps and debuffs.
----------MARTIAL, MAGIC
DAMAGE: Knight, Sorcerer
SUPPORT: Rogue, Cleric
UTILITY: Ranger, Wizard
(Edit: Rogue and Wizard trade off on their support/utility roles, they're capable of both but each inclined more to one)
Tankiness: Knight > Cleric > Ranger > Sorcerer > Rogue > Wizard