In my opinion Philadelphia dropping the NFC East is the least likely scenario outside of the Rams imploding and missing the playoffs.
The Cowboys need to pass one more team in the standings if we assume they win out. I’m going to assume they win out because if they don’t their chances to get to the playoffs drastically decrease and this whole exercise is pointless.
Irrelevant teams in the hunt for the Cowboys:
Panthers
Buccaneers
Lions
The cowboys are either already ahead of these teams (or will be when they win out) or they will be a division winner and thus not relevant.
Teams ahead of the cowboys:
Bears (3)
Packers (2 - tiebreaker considerations)
49ers (2)
Rams (3)
Seahawks (3)
These teams need to lose the indicated number of games for the cowboys to pass them in the wildcard standings. There are many games between all these teams where at least one of them will lose and that number ticks down one spot. We want one teams ticker to hit zero. For this reason we want either GB or CHI to sweep their series (Chicago sweep would be better as if that happens, Cowboys are in if they win out). We would prefer that these teams don’t split their loseable games in such a way that no team hits zero. It’s for this reason that Carolina beating the Rams was a good outcome because even if it’s highly unlikely that the Rams implode and hit zero, Carolina is not relevant as they are already behind the Cowboys in the standings.
The most likely path to the playoffs, though this is subjective, from most likely to least likely:
San Francisco losing two games (Tennessee, Seattle, Chicago, Indianapolis)
Chicago losing three games (Green Bay x2, San Francisco, Detroit, Cleveland)
Green Bay losing two conference games (Chicago x2, Minnesota, Denver, Baltimore)
Seattle losing three games (Atlanta, Indianapolis, LA Rams, Carolina, San Francisco)
Philadelphia losing two games (LA Chargers, Buffalo, Las Vegas, Washington x2)
LA Rams losing three more games (Arizona x2, Seattle, Atlanta, Detroit)
The biggest thing look out for is losses by teams that are not in the playoff hunt. I haven’t done the math for exact permutations of what could happen, but many of these teams ahead of us play each other and will drop their magic numbers down in these matchups. Any time a team loses to a team not in the hunt (or in the AFC) then that’s an extra number dropped and makes it much more difficult for the Cowboys to miss the playoffs if they win out.