Frank’s legacy is almost entirely tied to how this season ends.
If this season ends with crimson and blue confetti falling from the rafters on a Monday in April, Frank’s legacy will surpass most everyone, particularly if he is also POY. That likely also makes him an NBA draft pick, and if Frank parlays that into a solid career, his legacy will be up there with all of the legends (and his jersey will hang in the Fieldhouse).
If this team gets knocked out in the second round, Frank’s legacy is probably somewhat similar to that of Sherron’s, but a step lower because he lacks a title to go with it, even if he ends up with his jersey retired as POY.