What are the rock bands from the 70s & 80s that you wish you could have seen that no longer has the lead singer now that they did then?

for me van Halen when David Lee Roth was in the band I believe they were the best. Journey when Steve Perry was lead singer the band hasn't had nearly the success it has had since his departure. My listahan can go on & on but these are the probably the tuktok two =)