DBZ Deaths

Android #17:
When Cell self-destructs
Killed in the future timeline by Trunks

Android #18:
Killed in the future timeline by Trunks

Android #19:
Blasted by Vegeta's Big Bang Attack
Killed by Trunks in GT

Android #20(Dr. Gero):
His head is stomped by #17 in Android Saga
Head is stomped on again in Movie #7
Skull is crushed AGAIN in the Trunks Special
Killed by Super #17 under Dr. Muu's control in DBGT

Burter:
When his neck is snapped by Vegeta's knee

Babidi:
Head blown off by Fat Buu

Bardock:
When Frieza destroys Planet Vegeta

Bebi:
Destroyed by SSJ4 Goku

Bibidi:
Killed by the East Kaioshin

Black Sousei:
Killed by Goku and Android #8

Bubbles:
When Cell self-destructs on King Kai's planet

Bulma:
Turned into chocolate and eaten by Super Buu

Cell:
Killed by Gohan's Kame Hame Ha
When Trunks returns to the future

Chaozu:
Blown away by Piccolo Daimaoh
When he self-destructs in an attempt to kill Nappa
When Kid Buu blew up the Earth
In Future Trunks' timeline, he was killed by the Androids

Chi-Chi:
Turned into an egg by Super Buu, then smashed

Dabura:
Turned into a cookie by Fat Buu

Dende:
Killed by Furiza

Dodoria:
Killed by Vegeta's Galick Ho

Drum:
Decapitated by Goku

Frieza:
Sliced and by Trunks then blasted
Killed by Goku in Mirai Trunks' timline

Garlic:
Destroyed by Kami-sama

Guldo:
Decapitated by Vegeta

Giran:
Killed by Tambourine

Gohan:
When Kid Buu blew up the Earth
In Mirai Trunks' timeline, he was killed by the Androids

Gohan (Goku's Grandpa):
Stepped on by Oozaru Goku

Goku:
Sacrificed his life to save the world from Radditz (Piccolo killed him)
Sacrificed his life again by teleporting with Cell when he was about to blow up
In the Future Trunks timeline he died of a heart disease

Goten:
When Kid Buu blew up the Earth

Guru:
Dies of stress on Namek
Dies of natural causes on Earth

Gregory:
When Cell self-destructs on King Kai's planet

Gyuu Mao:
Eaten by Super Buu after being turned into chocolate

Jace:
Vaporized by Vegeta

Kami-sama:
Dies when Nappa fries Piccolo
Vanishes when Piccolo dies in the Trunks' timeline

Master Roshi:
Died trying the Mafuba attack on Piccolo Daimao
Eaten by Super Buu after being turned into chocolate

Korin:
When Kid Buu blew up the Earth

Kibit:
Beheaded by Dabura

Kid Buu:
Vaporized by Goku's Genki-dama

King Cold:
Blasted by Trunks
Killed by Goku in Mirai Trunks' timline

Krillin:
Killed by Tambourine
Killed by Freiza
Turned into chocolate and eaten by Super Buu
Killed by Android 17 in DBGT
In Future Trunks' timeline, he was killed by the Androids

Kui:
When Vegeta explodes him

Dr. Muu:
Skull crushed by Bebi
Destroyed by Super #17

Mustard:
Killed by Gohan

Namu:
Killed by Tambourine

Nappa:
Killed by Vegeta in DBZ
Killed by Vegeta in GT
Killed by Vegeta AGAIN in GT

King Kai:
When Cell self-destructs on his planet

Oolong:
Eaten by Super Buu after being turned into chocolate

Piccolo:
When protecting Gohan from being killed by Nappa
When Buu blew up the Earth
When the Earth explodes in DBGT. His love for earth causes him not to
leave.
In Future Trunks' timeline, he was killed by the Androids

Piccolo Daimaoh:
When Goku rips through his chest with a flying headbutt

Mr. Popo:
Eaten by Buu

Puar:
Eaten by Super Buu after being turned into chocolate

Pui Pui:
Killed by Vegeta

Radditz:
Hit by Piccolo's Makankosappo
Red Ribbon Army:
Wiped out by Goku

Recoom:
Vegeta blasts him after he is hit very hard by Goku
Rou Dai Kaioshin:
When he offers his life to Son Goku

Salt:
Killed by Gohan

Shen-lon:
Killed by Piccolo Daimao

Spice:
Killed by Gohan

Super #17:
Destroyed by Goku and Android #18

Tambourine:
Killed by Goku

Tao Pie-Pie:
When his own grenade is kicked back to him
After being disqualified from the 23rd Budoukai for pulling out a knife, killed by Tien

Tien:
Killed himself with a Kikoho when trying to destroy Nappa
When Buu blew up the Earth
In Future Trunks' timeline, he was killed by the Androids

Trunks:
When Cell blows a hole in his chest
Killed in Cell timeline
When Buu blew up the Earth

Ubuu:
Accidentally turns himself into chocolate, eaten by Bebi Vegeta

Vegeta:
When Freiza kills him on Namek
When he sacrifices his life to destroy Buu
In Future Trunks' timeline, he was killed by Android 17

Videl:
Turned into chocolate and eaten by Super Buu

Vinegar:
Killed by Gohan

Yajirobe:
When Kid Buu blew up the Earth
In Future Trunks' timeline, he was killed by the Androids

Yakon:
Overwhelmed by Goku's Ki

Yamcha:
When a Saibaman self-destructs
Turned into chocolate and eaten by Super Buu
In Future Trunks' timeline, he was killed by the Androids

Yamuu:
Killed by Pui-Pui

Zarbon:
When Vegeta digs his arm into Zarbon and fires a blast