In my mind all the people in WoT have nationalities. 

This is NOT official... but...

Atha'an Miere - Greece

Aiel - Ireland

Arad Doman - Iran

Andor - UK English (Two Rivers - US English)

Cairhien - France

Illian - Russia

Arafel - Israel

Kandor - China

Shienarian - Japan

Malkier - India

Saldaean - Mongolia

Tear - Spain

Mayene - Morocco

Altara - Germany

Tarabon - Italy

Amadicia - Romania

Gheldean - Germany

Murandy - Switzerland

Shara - Brazil

Seanchan - Egypt

As such, the women in my mind take on the flavor of the nationality.  I have a strong attraction to Iranian women so the hottest woman in the series for me is Leane, post stilling.

A close second is Berelain, then Nynaeve, then Lanfear (though she has no nationality per se, in my mind she is Cairhienien, since she masquerades as one).