Kaine's a whole lot more boring than Warner. Is there a particular reason Atlas thinks he's so much better?
Of these, though, probably Al Franken.
Kaine is less of a corporate shill/DINO and marginally better on the stump. Kaine is the pretty obvious pick strategically.
If Warren is off the table (idk why Hillary would ever pick someone so potentially antagonistic to her admin though Liz would be a big asset during the campaign phase), Kaine is okay.
Someone like Brown or franken would be better but I'm starting to feel that you shouldn't risk too much in terms of Senate calculus with this pick - like sabato says, just pick someone safe and respectable and get it over with.