Yeah, all the Dem big wigs would give Biden the money for his due shot at the nomination unless another candidate (like Warren or Gillibrand) presents themselves as a better option.
As for the others: Cuomo isn't going to sell well on a national stage as his personality and voice are incredibly off-putting to those outside of the northeast, or even the Tri-State area for that matter. O'Malley and Klobuchar seem more like talking heads than presidential material and won't go anywhere unless they try and drive up the Warren crowd. Booker won't run with less than 2 years of Senate experience. Schweitzer, if he stops his crazy streak, will lose on guns. Webb and Warner have enough experience and stature that one of them could reasonably challenge Biden if Warren and Gillibrand stay out.
To quote Ken Wantanabe, "let them fight."