I have some ideas for classes. I want more classes, but you may go with 3 if you like.

Knight: Tank, defensive, focuses on Vitality.

Shaman: Damage, Casts spells, focuses on Mind power.

Priest: Healer, Casts healing spells, focuses on Holy.

Rogue: Damage, fast, not many spells, focuses on Stealth.

Dancer: All-rounded, Does almost all things, except weaker, focuses on Grace.

Skills! As mentioned in above.
Vitality: Defense increase, HP restoration increase, Health increase.
Mind Power: Spell damage increase, MP restoration increase, Mana increase.
Holy: Healing effectiveness increase, MP restoration increase, Mana increase.
Stealth: Speed (dexterity) increase, Better luck, Damage increase.
Grace: Everything except smaller.

Weapons!

Swords
Daggers
Wands
Staffs
Whips ( A thing for dancers!)
Bows
Crossbows
Shields (not really a weapon but its something)
Shurikens (ninja stars) (for rogues)!
Hope you like