Yeah I think cloeh_morgan in particular has hair that is possibly longer than that of issabelle_69, but emilayton_ might have the longest I've seen, but OP is right in that emilayton_ is more difficult to get a good video or "performance" out of than issabelle_69, which is a shame because her hair is amazing.

Another one who is in the contest for the longest hair on CB is kitsuneserina77. Her hair is reaching her knees, but, unfortunately she's become batshit crazy and should be avoided at all costs (she used to be awesome on MFC two years ago).