any of Daredevil's GF's-Elektra is killed by Bullseye, Karen Page is alsokilled by Bullseye while trying to protect a really mess up DD, and Heather Glenn hangs herself. Then there was that really hot redheaded one, what was her name> Glorianna? Yeah she was killed really senselessly too. I just hope they don't kill Black widow or Milla Donovan, i really like them.
Superman when he fought Doomsday, guys I was a child when I read it and I nearly cry.
Flash II a.k.a. Barry Allen, same thing.
Captain Marvel during Kingdom Come.
Jack Of Hearts, we'll miss you Jack.I think he was one of the greatest Avengers, and his death was great, flying into space, exploding like a star, but what a waste of potential, I hope they bring him back.
Ben Reilly, he died as a hero, wonderful.
Wonder Man, he died cause he prefer to fight and die like a hero instead of fighting the Avengers, that were become his friends, and his family.
Wonder Man and Atlas quasi-dead:
They absorb all the energy of Nefaria's Ionic Bomb to save the world, and what Eric Josten said to Songbird before falling unconscious was really heroic:
I've done a good thing, I'll die happy.