Overlord is right about that (and me not getting a pony
)
Here's a list if you really want it.
Frieza Saga
Goku+Gohan+Krillin vs Vegeta (Let him kill you once for the PL advatage)
Gohan+Krillin+Vegeta vs Frieza (S-Bot)
Piccolo+Gohan+Krillin+Vegeta vs Frieza (Next-One-Up-S-Bot)
Goku+Piccolo vs Frieza (Same as above)
SS Goku (Train before a bit) vs Frieza (Same as above)
Cell Saga
Piccolo vs Cell
Vegeta+Trunks* vs Cell (S-bot)
Goku* vs Cell (S-Bot)
Gohan* vs Cell (S-Bot)
Buu Saga
Goku* vs Vegeta*
Vegeta* vs Buu
Goku* vs Buu
Gohan vs Buu
Goku*+Vegeta* vs Buu (S-bot)
* Get to trans PL first
That's if you want to be good. Swap the sides if evil.