I think that if any of them would survived they'd either behave like a "normal" great raven without a master/purpose and became sorta wild or they'd go to their last master.
Well...
Anomander Rake is dead
but Anomandris (Im not 100% sure if i got the right name) took after him, so ravens could've go to him to serv him in the black coral or just go there to take shelter/live there because andi are quite a "magical" race.
Still we don't get any evidence that any of them survived. I think that some of them should have. Why? Well they have to guard coltains soul or his vessel (i guesse).