My Fighter is a proud Dwarf from the Mithral Halls. He is a history buff, with proficiency in history, a personality trait of "I know all the stories," and a perfectly healthy obsession with the adventures of Bruenor Battlehammer.
I've read up on the Forgotten Realms wiki about Bruenor, so as a player I have pretty good knowledge about him. My character is really into this stuff, so certainly he knows more than average characters do; however, it's unclear how much of this information would be known to a resident of the Forgotten Realms and how much is only known to readers of the lore.
What major highlights about Bruenor Battlehammer's adventures and life would be known to a character beset by hero worship? Our campaign takes place somewhen around 1484 DR.
As an example, I'm pretty sure everyone knows he was King. Twice. But then he faked his death—is that common knowledge? Then he actually died—how about that? And he was resurrected; I can only assume nobody has heard about that yet.