Coleman Kcaj's fate

I've always thought Coleman had been killed by Grevious in the battle of Coruscant and that the seat Anakin later took was his, but I've recently rewatched RotS and noticed he was still safe and sound after that battle. Now, does anyone of you know his fate, or at least if he was in the jedi Temple during operation knightfall? And whose was the seat Anakin took?

Even Piell iirc that's who Anakin replaced

The Council throughout the Clone Wars: http://a.dilcdn.com/bl/wp-content/uploads/sites/6/2014/11/Jedi-Council-with-total-text.jpg

But yeah, I don't think anyone knows where Kcaj was during Operation: Knightfall.

He's probably dead. Lets leave it at that