All of their deaths were incredible!
Kisame as had been said quite a few times already bit off his tongue and committed suicide to prevent intel leakage
Konan fought against tobi knowing she would die, defending her friends body, her home
Pain ended up sacrificing his self to resurrect konoha
Itachi, after everything he's had to do and go through that led to his final meeting with sasuke, willingly walked to his death hiding the truth and his illness the entire time just to save sasuke from the pain he went through and to make sure sasuke would have the strength he needed in the times to come
Sasori ended up allowing himself to be killed by his grandmother with the parent puppets he made
Even hidan and kakuzu had interesting ends although not as emotional as the others they were powerful in their own right
Deidaras was probably the worst imo he thought he was going to leave an impression but other than a patch of scarred land it did nothing
And orochimaru if you count him was interesting even though he hasn't had a true end yet
Looking back it's hard to think that a group of such powerful ninja were killed. If they had moved as a group instead of twos they would've never been defeated. Can you imagine facing deidara, itachi, kisame, konan, pain, kakuzu, hidan, zetsu, obito, and sasori and maybe orochimaru if you count him at the same time? No one village would've been able to defend against that and even if they united and had the strongest ninja from each village go up against them I think akatsuki would win fairly easily