But I'm not sure many are going to look at Wentz as a better option. The ones I potentially see:
New England, Denver, Atlanta, Indy, Carolina, New Orleans, Chicago, Detroit.
New England: IMO, this one makes sense.
Denver: Depends on if they want to give up on Drew Lock already. IMO, this one is also a fit.
Atlanta: If they are ready to move on from Matt Ryan, they could. He's 35 and it might be time. Would probably also be good for Ryan if he wants a change in scenery.
Indy: If Rivers was just a one year solution, they might consider it. Personally, I'd keep Rivers if I were them. And if they don't I don't see Wentz as such an upgrade over Brissett that I would spend much capitol.
Carolina: don't see them going away from Bridgewater yet.
New Orleans: This one is an interesting thought, but they Taysom Hill and Jameis Winston in house already if Brees retires.
Chicago: The fact the NFC is so bad this year and that the Bears are probably going to make the playoffs means he's probably going to be back.
Detroit: Another Ryan like situation, but he's 32 and Ryan is 35. Personally, I think if you are going to look to replace Stafford, you do so but drafting a guy who could eventually take the spot -- but I don't see Stafford in any other uniform but Detriot next year.
My opinion of the three most likely landing spots would be New England, Denver, and Atlanta.
Cutting Wentz's conventionally next year is impossible. The Eagles would have $59,220,611 in dead money, a cap charge for a player no longer on the roster, by releasing Wentz before $15 million of his injury guaranteed $22 million 2022 base salary becomes fully guaranteed on the third day of the 2021 league year (March 19).
A Wentz trade would provide the Eagles minimal cap relief because Wentz would need to be dealt before his $10 million roster bonus is due next March 19. After this date, the $10 million would be a Philadelphia financial expenditure and cap charge with a trade. Philadelphia's cap charge or dead money would consist of the $33,820,611 of bonus proration left in Wentz's contract.
There probably wouldn't be many suitors because of Wentz's regression and the acquiring team would need $25.4 million of cap room to absorb his 2021 salary, which would no longer be a Philadelphia obligation. If next year's salary cap is at or near the $175 million floor, only a limited number of teams will have the necessary cap space anyway.

Agent's Take: Are Carson Wentz's Eagles days numbered? A closer examination of his contract tells the story
Philadelphia has found themselves in quite the conundrum at the QB position

Based on the above the only team that could afford him would be New England with their projected $100 million in cap space.

2021 NFL Team Salary Cap Tracker
A real-time look at the 2021 salary cap totals for each NFL team, including estimated cap space.
What a disaster for Philadelphia.