The Golden State Killer should be as notorious as The Zodiac, BTK, etc. This case seems solvable in my opinion and he is most likely still alive. The hours devoted to this case by online detectives is amazing.
DB Cooper, the Zodiac killer, and Bishop are the three cases I want solved the most. While DB Cooper didn't do anything as heinous as Bishop and Zodiac, I find the story fascinating.
There is also a missing person case in my native New Zealand that I would love to be solved. Peter Douglas Coop, who went to the same high school as me, although many years earlier. A fascinating case with evidence suggesting he staged his disappearance.
I exchanged a brief email with James Bruno to mark the 41st anniversary of Bishop's crime. He seems to be of the same thinking as most of us here, that this crime will never be solved. "Sometimes justice never catches up with evil".