And you don't see tsundere, dojikko, meganekko or such character types either. However these can be located, but most of them can have multiple locations and thus it'd be pointless to write tsundere all over the chart.
Let us assume we're talking the aggressive and lethal type of yandere. First of all we'd consider what kind her dere is, which should be easy to locate on the table. Depending on how different her yandere-part is it could change the moekkos location a lot. I'm not very familiar with yanderes myself, but I suppose most of them belong to the right side of the upper-left corner (see where Revy is in the OP) or lower-left corner if we're talking about a yuri show.
Yandere is relatively difficult type of moe compare to others. I think it should be thought as the reverse of the usual moe situation where the girl is the one being protected. This would also place yanderes in upper-left corner since the girl can also be stronger than the male. The more forceful she is towards the male, the more righter she is located. For example forcing someone to pay attention to her would still stay on the left side as it could be considered as her cry for love and care, but forcing someone to love her against their will would be on the right side, no longer pure love.
Isn't moe debate just wonderful?