Characters and Classes

The Most Basic and Old School Compatible "Ish"

Boxers (Monks)
Crazy Boys (Level Drain variant)
Elfs (Halfling rules)
Fighters 
Financiers
Gnomes
Heathens ("Fuck Druids" or Witches)
Hobbits
Judges (Paladins)
Robbers (Thieves)
Unbreakables (kung fu healers)
Wizards (Non-magical Magicians, after Oz)

The Weird Stuff

Brainiac
Brave Little Tailors (Uses this Power Ups system but can be modified to not need it)
Fucking Pterodactyls
Koreshan Sphere Wizards
Magic Animals (Familiars) (This one lacks some polish)
Monster Kids
Muscle Wizards Cover
Punks
Selkies
Shopgirls (Add-on class) 
Shyguys 
Sinistrines (Clerics of Sinistar)
Warduke

The Stuff That Didn't Work As Well Or Never Got Used

Apes
Bagginses (Living Magic Object)
Crocmen
Cuckoos
Doomseer (Class mod)
Evolutionists
Fake Ghosts
Gentlemen
Journalists
Monks (Random)
Monster Trucks  
Pacifists
Rockpriests
Scriveners
Tossers
Zombies 

The Worst

Brave Little Tailors (Add-on class)
Horde Trooper
Omens 
Rogue Time Lords
Surf Rockers

The Peoples Project

(This was an attempt to do fantasy types/races that didn't always have to do with animals and elemental variants or constructs/undead.....basically every fantasy "race" that splatbooks bring out and always follow the same ideas. These are not statted up as classes or add-on-races but....maybe helpful?)

The Aching People
The Apocrine
The Couriers
The 'Distant Cousins'
The Hate People (Scoren)
The "Headless"
The Kavarrnus
The Lazurus
The Left
The Melt
The Scribbles
The Smoke Assassins
The Twinmen