Terrible comparison. You don't hear about those coaches because all (with the possible exception of Matta) are at inarguable destination jobs. The only place those coaches could go would be to the NBA, or if they got bored and decided to exchange jobs with one another.
Tubby is unique because most of the talking heads consider Minnesota to be "below his station" in life. They all assume that pretty much any BCS job that opens up would be an upgrade over the Gophers, because why would anyone want to be here?
The problem with this theory is that Tubby willingly sought out the Gophers over many other like jobs because he wanted to get out of the Kentucky meat grinder and have a lower-stress job to finish out his twilight coaching years. The odds of him leaving are very small in my opinion, because he's obviously not seeking a Kentucky-type job (or he would've just stayed there in the first place), and jobs that are similar to Minnesota would just be exchanging one set of problems for another, while losing all the equity he's built here over the last 4 years.