1) Death of Illyana from the Legacy Virus. Shadowcat/Jubilee is around at her death bed. Colossus doesn't realize her death until later.
2) Death of Douglas Ramsey when saving Wolfsbane.
3) Death of Super Skrull by the hands of Reptyl. S'Byll, his lover doesn't show the usual emotion and only Silver Surfer mourns him.
4) Death of Mastermind. He shows his humanity by kicking Jean and the like out of his mind from also dying.
5) Death of Gwen Stacey at the hands of Green Goblin. Spiderman catches her too late and later Green Goblin accidently gets himself killed by his flyer.
...
1.Hal Jordan (final night, vs sun eater)
2.Supergirl (precrisis, vs anti-monitor, COIE)
3.Batman's Parents (batman-year one)
4.Jean (first death)
5.Illyana (legacy virus)
6.Superman (vs doomsday)
7.Flash Barry Allen (vs anti-monitor, COIE)
8.Jason Todd (vs joker)
9.Saint of Killers' family (preacher)
10.Sarah Gordon (vs Joker, No Mans Land)
11.Punisher's family
12.Archangel Michael (vs lucifer)
13.Ultimate Hawkeye
14.Rose (origin, vs logan)
15.Jor-El and Lara (on krypton, birthright)
16.Wizard Shazam (Day of vengeance, vs spectre)
17.Kilowog and the GLC (emerald twilight, vs hal jordan)
18.Donna Troy (vs cyborg, graduation day)
19.Magneto (vs super-sentinal, genosha)
20.Thing (authorative action)