Credit: Curb Your Enthusiasm: Mitch Haddad/Warner Bros.
Sidekick to: Larry David Curb Your Enthusiasm (2000-present)
Would Curb Your Enthusiasm's Larry be able to make a complete mess of any awkward situation without his rotund (or, according to Jeff's own potty-mouthed wife, ''fat f---'') manager/best buddy? Whether helping his nebbish-y client swipe a doll's head from his own daughter or pilfering a 5-wood from a casket, Jeff doesn't just indulge David's paranoid delusions and crazy scams — he enables Larry's entire misanthropic worldview. That is, when he's not allowing Larry's wife Cheryl to ''pop in'' on his fantasies. —Charles Curtis