Warnock wouldn’t be nominated for VP solely because of that senate seat. And Buttigieg appeals no almost nobody
Buttigieg would have the same amount of appeal as someone like Josh Green or Brian Schatz. It's not like the VP pick really makes or breaks anyone's vote anymore.
Warnock I understand the dilemma with his Senate seat but he would
at least be considered. Three swing state Governors are included on OP's list, and I can only imagine the risk we'd be taking in Arizona or Pennsylvania by removing their newly-elected Democratic Governor this early into their term...