IMO the author is Dalinar...
1. "Has been" a Monster--- Blackthorne
2. Called Godless Heretic by many
3. Ardents try to force him to take back his words regarding God as we saw in chapters a few weeks back.
4. Killed someone he loved dearly (sshshhh or whatever the new name was)
The rest, i think is in Oathbringer, we will see next month