Warrior, Archer, Mage...
Level 20 Martial Fighter
Level 10 Knight
Level 20 Barbarian
Level 1 Warrior
Level 20 Templar
Level 10 Paladin
Level 20 Holy Fighter
Level 20 Scout
Level 10 Ranger
Level 20 Rogue
Level 1 Archer
Level 20 Sharpshooter
Level 10 Marksman
Level 20 Tracker
Level 20 Priest
Level 10 Light Wizard
Level 20 Illusionist
Level 1 Mage
Level 20 Necromancer
Level 10 Dark Wizard
Level 20 Chaos Power
Also, I would've added more classes but with the three base classes, it's pretty had to add extra ones. I'll add some more with level 30, then level 50 you'll have some new three classes, at level 80 with new upgrades, level 100 will be the last classes, and we'll have reborn powers :)
I can also make skills, like wind arrow or something better. It may take awhile and might take ages, also, what type of map are you going to be using? I wanna create a world map which you can add.
Also, I start as a Mage, for my goal will be Chaos power.
Edit:
I have more to add, we also need a start for our character, how we started at the beginning and what is our past.
Edit2:
You can also get some ideas from what I failed before in my story.
http://forum.blockland.us/index.php?topic=86000.0