I am not familiar with all of the KBG cultivars and types, but Mazama and Bewitched come to mind, as have already been mentioned.
I have some Mazama growing under partial shade conditions, and it does well there, but that is in Tennessee, where shade can be a good friend to cool season turf.
I don't know how much shade is too much shade relative to your environment, but I agree that the target area looks really shady. I think that
@Babameca is suggesting a smart strategy.