ESPN’s Bill Barnwell rates the Saints as least desirable job for HC candidates [mod edit]
Outside of maybe the Bears job, assuming coaches really like Williams, and the Bengals job if it comes open, the rest of the jobs are in a jumble and which is worse or best depends on what a coach is looking for. Some will want a large market because they can make more money on local shows, etc. Some will want a small market with a press corps that isn't always after their job. Some will like the QBs some teams have and not like the QBs some teams have. Some will care about the cap and others will not. Some will care more about ownership that is hands off and gives them money to work with. Some will care about full control over personnel and others won't. Some will only care how big and how long the contract is.
These jobs are open because the teams lost a lot of games. None of the possible options are going to be without their issues. Which issues a coach will see as deal breakers will depend on the coach. And frankly, not getting the top one to three guys doesn't mean you don't get a good or even the most successful coach. Nobody thought O'Connel and Campbell were the best candidates in the years they were hired.