Rupp didn't win a title from 1959 through 1972, the year he retired. His last two teams not only didn't make a FF, but were destroyed by WKU 107-83 and by Florida St the next year by about the same margin as I recall. In fact, Rupp only made it to 1 FF in his final 13 years and that was 1966 when we lost to Texas Western. The game was evolving from Rupp's glory years and like many others such as Bobby Knight, for example, he never really adapted to those changes.
IMO, the closest any coach (aside from Rupp) has come to uniting the fan base was RP. He was not the recruiter Cal is, but he was probably the most well liked until he took the U of L job and the rest is history. If we lose Cal, whenever that may be, we will experience a big loss in the talent we bring in. That's very likely to happen, so be prepared and understand that anyone who replaces Cal is going to be under the most intense scrutiny. I wish whoever that person is a lot of luck because s/he will need it.
CB has changed so much since the early 60s when I first began following it and the job is so much more difficult with all the unsavory recruiting tactics, referee bias and maybe downright corruption, NIL et, etc. That's why I believe Jay Wright wanted out after winning those 2 NCs. I don't blame him. I hope UK'[s program is restored to the greatness it had for so long, but time will tell.