Deliana imo , but wait for more suggestions overall before making your OWN choice on which one !

I'll echo that sentiment. From there forwards, I'd probably just farm food for now. Grizzled Jarl will likely be your next 60, but it's a bit too early to commit to him. I'd like to see who else you get in the interim.

Deliana is the easy pick. Gets murky after as we've got some solid epics (Kaiden, Shatterbones and Jarl) but not sure I would want to immediately 6 any of them. 

I'm on team wait and see.