Please, please dont use silly (stupid) D&D system...
Originaly, Warhammer FRP (it was IIRC based on 3rd edition) had folowing tabel:
Law-Good-Neutral-Evil-Chaos
Note that Law is not same as good (Law god Solkan cames as a prime example), Good is often oposed with Law, most of people are neutral (unlike silly D&D where most of people are some kind of good
), Evil is not a same as Chaos (Example of Khaine, god of murder that hates Chaos) and Chaos is not always evil in clasical way (Something Rotten In Kislev scenario for TEW)...
And new edition actualy did great thing - it tossed all aligement sistem out of window... 8)
Anyway here is my split for WFB:
Bretonians, Dwarves, Empire, Lizardmen - Neutral;
High Elves - Good;
Wood Elves - Mostly neutral with some good tendencies;
Chaos - Well this is actualy tricky one - most barbarian tribes would actualy be neutral (they don't understand true nature of the chaos gods, and actualy want to survive in same way they survived so far) while Chaos Warriors and such would be chaotic; There would also be other neutral parts such as Chaos Spawns - if it has no inteligence it can not be realy clasified as Good/Evil...
Dark Elves - Evil. While they have chaos cults present they would not be any more chaos orientated then eg. Empire - those are non-official cults after all, things that are present in Empire also.
Orks - Evil. There are some neutral parts such as a Snotlings - they are too stupid to be realy evil after all...
Ogres - Neutral. Bloodthirsty and savage - sure, but no more evil thatn any 18/19th Century African Tribe