Doug Jones as AG would be good, assuming he loses to Tuberville. He and Biden are personal friends, and he has got great civil rights credentials. Plus, there’s a lot of good will in the party towards him after he pulled off his win.
Whoever ends up as AG is going to have to make some big decisions around Trump, and could either end up as a huge hero or huge villain (most likely both to different people).
Doug Jones could definitely get bipartisan support for AG and give Biden a solid ally. I'd also expect Preet Bharara's name to get floated for AG, although that's purely speculative.
Agreed on both fronts. Jones, Bharara, and Sally Yates strike me as the front runners for AG.