I picked the one death that immediately popped into my head after I read the topic. Honestly, this was the only one I could come up with.
Mega spoilers if you haven't read City of Heavenly Fire, the last book in The Mortal Instruments series by Cassandra Clare. Highlight at your own risk! I pick Sebastian aka Jonathan. I'm pretty sure this was THE death everyone looked forward to. I know I was looking forward to seeing how it would all play out. It was more than satisfying if not a little sad :(
What was your favourite character death and thanks for visiting! Please just comment with the book name so other people don't get spoiled.