May be a little early to count Tennessee out of the one seed possibilities. Of the eight one seeds in the last two years, half had two or more losses at the time of the selection.
That, of course, is a purely numerical observation, and it makes more sense to look at the current candidates. I think we can safely assume that CT makes the list. Stanford is close to a lock. They only have a single loss. Maybe they stumble against Cal or Colorado, but even if they do, they have two losses and a win over TN, so hard to imagine that TN gets a one seed over Stanford.
However, Notre Dame and duke have two games against each other for certain, and likely a third. In fact, there only way there isn't a third is if one or the other loses early in the conference tournament. So Duke has a loss, and you have to add three losses minimum to the two schools. The best possible outcome is that they both end with two losses, which is the same as TN, so not a certainty that they both get a one seed ahead of TN. If they don't split the right way, one will have at least three losses. That alone makes it very possible that TN gets a one seed ahead of one or the other, without even consdering the possibilityy that MD or UNC or Syracuse or FSU manages an upset.
Another scenario is that ND stumbles against TN, I don't think that is likely, but they have a track record of losing to TN even when seemingly of similar strength.
As Nan points out, even if ND and Duke beat up on each other and knock one of them down to a two seed, Baylor might grab the last one seed ahead of TN, but if CT does its job, Baylor will have two losses as well, so that's not a certainty.
Of course, if Kentucky or LSU hangs anther loss on the LVs, a one seed is out of the picture, but I think it is a bit too early to count it out now.