Deaths and Life Transitions

Pre-Dragonbll:
» West Supreme Kai by Buu
» South Supreme Kai by Buu
» North Supreme Kai by Buu
» The Tuffle Race by The Saiyans
» King Vegeta by Frieza
» Planet Vegeta by Frieza
» Grandpa Gohan by Goku

World Tournament:
» Boss Rabbit by Master Roshi

RR Army Saga:
» General Blue by Mercenary Tao
» Bora by Mercenary Tao
» Commander Red by Assistant Black
» Assistant Black by Goku
» Captain Yellow by Goku

Tienshinhan Saga:
» Krillin by Tambourine

King Piccolo Saga:
» King Chappa by Tambourine
» Bacterian by Tambourine
» Giran by Tambourine
» Ranfan by Tambourine
» Cymbal by Yajirobe
» Tambourine by Goku
» Roshi after using Evil Containment Wave
» Chiaoutzu by King Piccolo
» Shenron by King Piccolo
» Piano by King Piccolo
» Drum by Goku
» King's Guard by King Piccolo
» King Piccolo by Goku

Saiyan Saga :
» Iedia by Vegeta and Nappa
» Planet Arlia by Vegeta
» Radditz by Piccolo
» Goku by Piccolo
» Yamcha by Saibaman
» Saibamen by Krillin
» Piccolo by Nappa
» Chiaotzu by Kamikaze
» Tien after going all out
» Nappa by Vegeta

Namek Saga:
» Cargo by Frieza
» Dodoria by Vegeta
» Zarbon by Vegeta
» Kiwi by Vegeta
» Guldo by Vegeta
» Recoome by Vegeta
» Burter by Vegeta
» Jeice by Vegeta

Frieza Saga:
» Vegeta by Frieza
» Krillin by Frieza
» Dende by Frieza
» Small Village by Vegeta
» Most Namekians by Frieza

Trunks Saga:
» Frieza's Henchmen by Trunks
» Frieza by Trunks
» King Kold by Trunks

Android Saga:
» Android 19 by Vegeta
» Dr. Gero by Android 17
» Countless Humans by Androids

Cell Saga:
» Android 16 by Cell
» Future Trunks by Cell
» Cell Juniors by Gohan
» Goku by Cell
» North Kai by Cell
» Gregory by Cell
» Bubbles by Cell
» Cell by Gohan

Majin Buu Saga:
» Spopovitch by Babidi
» Yamu by Babidi
» Kibito by Dabura
» Pui Pui by Vegeta
» Yakon by Goku
» Dabura by Majin Buu
» Babidi by Majin Buu
» Vegeta by Kamikaze
» Human Gunman by Majin Buu
» Human Gunman 2 by Majin Buu
» Ch-Chi by Majin Buu
» Yamcha by Majin Buu
» Krillin by Majin Buu
» Bulma by Majin Buu
» Videl by Majin Buu
» Piccolo by Majin Buu
» Gohan by Majin Buu
» Android 16 by Majin Buu
» Android 17 by Majin Buu
» Captain Ginyu by Majin Buu
» Trunks by Majin Buu
» Goten by Majin Buu
» Tien by Majin Buu
» Planet Earth by Majin Buu
» Majin Buu by Goku

Baby Saga:
» Piccolo by Baby

Super 17 Saga:
» Super 17 by Goku and #18
» Dr Gero by Dr. Myuu

End of Dragonball GT:
All existing characters but Dende, Mr. Popo, Goku, Pan, and probably Roshi, die of old age.

Alternate Timeline:
» Goku by Heart Disease
» Piccolo by Androids
» Vegeta by Androids
» Krillin by Androids
» Yamcha by Androids.
» Gohan by Androids
» Tien by Androids
» Chiaotzu by Androids
» Android 17 by Trunks
» Android 18 by Trunks
» Android 20 by Android 17
» Cell by Trunks
» Most of the Human Race by Androids .