I want to preface my list by saying that thankfully, I have been able to see most of the bands that I grew up listening to over the last 13 years. The main ones that I did not see yet, I cant see or wont see because of deaths (Nirvana, Pantera, Alice in Chains are some that pop in mind; and no I would not see any of those bands with a replacement member).
That being said, a few inactive bands that I would like to see would include:
Romeo Void, Siouxsie and the Banshees, Talking Heads, Pink Floyd, Nitzer Ebb, Sepultura (no way I would see them without Max), Curve, Exhorder, Tripping Daisy, White Zombie, Tru
(^ only 80s/90s bands)