would be almost completely dependant upon the class:
Wizard 18int 3str/cha
Sorcerer/warlock 18cha 3 int
bard 18 cha 3 str
Fighter/barbarian 18str or dex, 3 int/cha
ranger/monk 18dex 3 cha
all are pretty tropey, ie the weakling bookworm wizard, or crotechty old wizard, dumb fighter, surly...