In the city where I live there are far more Sunnis than Shias. For the purpose of marriage would it be permissible for me to marry a Sunni woman if I cannot find a Shia one as long as she does not bear hatred towards the holy Ahl al-Bayt?
Yes, it is permissible, and you can try to guide her to the school of Ahl al-Bayt (pbut).