The Almighty has another name, spoken only by the ardents. "Elithanathile" — He Who Transforms. 
In the dream, a voice speaks to Kaladin and calls him Child of Tanavast, Child of Honor, Child of the one long since departed.
Tanavast was, supposedly, the God beared of the Honor shard, killed by Odium long ago. Apparently, he was the father of Mankind in Roshar.
This probably means Tanavast is the one refereed as the Almighty.