I never expected Tippett to get in, the fact that he made it as far as he did was a feat in and of itself. Hall of Fames are always subjective, and any player we think capable of being inducted now, may fall off the radar by the time they are eligible.
That being said, I believe there are only 3 individuals that have a reasonably good shot of being inducted in the future - Belichick, Brady, and Vinatieri.
I think Dillon and Law should be considered, but see them more as long shots.
...but then again, who knows what motivates each HOF voter.