1. Sasori - he wanted to die against granny and sakura + more epic was he died arms of he's puppet parents hugging them like he did as a kid ( before killing and making em a livin puppets but still great death.
2. Jiraya - He knew he was goingto die if he'll go after pain alone, but in the end he was major reason city was able to beat biggest threat they've seen.
3. Nagato - he's whole life since child he witnessed murders,war and lost he's close ones and finally he realises that he's doing the right thing + good speech in end
4. Zabuza - Mist demon had such epic death if you can say so, it was just good
5. Kisame - so loyal member and a great ninja who would do everyhing in hes powers to make things right.