TheBritishSlimZaPToZ

I had the exact same issue, killed him at the exact same point, had Ralof and Hadvar attacking me. Tried using the console to enable and disable them, disable combat ai and all, none of it worked. I loaded a previous save, beforei saw Hadvar and Ralof in riverwood, outside Embershard mine. I stood there and waited for 3 in-game days. I then went to Riverwood, saw Hadvar and Ralof talking at the forge, they split up and neither attacked me. I think I fixed it permanently, but I'm not certain yet.