2020 Dem Dream Team: Vilsack(IA), Hickenlooper(CO), Bullock(MT), Yates(GA), Begich(AK), Foxx/Cowell/Stein(NC).
Of those three, I would probably want Foxx, as he would turn out black voters that a Democrat needs to win in North Carolina.
In Georgia, I'd rather have the loser of the Gubernatorial Primary this year (especially if it's Stacey Abrams), or either Jason Carter or Michelle Nunn instead of Yates.
Vilsack, Hickenlooper (if he isn't running for President), Bullock (see Hickenlooper) and Begich are all fine (in fact, I can't think of anyone else who can win in Alaska statewide for Democrats at the moment).