DEATHS

Goku
1. While holding Radditz, got killed by Piccolo's Special Beam Cannon.
2. When he teleported Cell to King Kai's planet and Cell self destructed.
3. In alternative timeline, died of a heart disease.

Vegeta
1. Killed by Frieza.
2. Self destructed himself in an attempt to destroy Majin Buu.
3. By androids in alternative timeline.

Frieza
1. Killed by Goku
2. In Cyborg form, killed by Trunks
3. In the next dimension, he was killed by Gohan for good (but he was dead already).

Piccolo
1. Killed while blocking Nappa's beam for Gohan.
2. When Majin Buu destroyed Earth.
3. Killed in Dragonball GT by Majin Gotenks.
4. Killed when Earth was destroyed by Babi Vegeta in Dragonball GT.
5. By androids in alternative timeline.

Gohan
1. When Majin Buu destroyed Earth.
2. Killed by androids in alternative timeline.

Krillin
1. Killed in original Dragonball by Piccolo Daimo's henchmen Tambourine.
2. Killed by Frieza.
3. When Majin Buu destroyed Earth.
4. Killed in Dragonball GT by Super #17.
5. By androids in alternative timeline.

Trunks
1. Killed by Cell
2. When Majin Buu destroyed Earth.

Goten
1. When Majin Buu destroyed Earth.

Tien
1. Used up all his power in an attempt to destroy Nappa.
2. When Majin Buu destroyed Earth.
3. By androids in alternative timeline.

Yamcha
1. Destroyed by a Saibamen.
2. Eaten by Majin Buu.
3. By androids in alternative timeline.

Chiao-tzu
1. Died in original Dragonball by Piccolo Daimoh.
2. Self destructed in an attempt to destroy Nappa.
3. When Majin Buu destroyed Earth.
4. By androids in alternative timeline.

Nappa
1. Killed by Vegeta who thought Nappa's loss as a weakness.
2. Was destroyed by Vegeta again in Dragonball GT.

Radditz
1. While held by Goku, was destroyed by Piccolo's Special Beam Cannon.

The Ginyu Force
1. Guldo was beheaded by Vegeta.
2. Recoome got his ass kicked by Goku, was blasted by Vegeta.
3. Burter was defeated by Goku, was killed by Vegeta.
4. Jeice was killed by Vegeta.

Zarbon
1. Killed by Vegeta.

Dodoria
2. Killed by Vegeta.