Raditz seemed pretty good at fighting and obviously his relationship with Goku and change of character would be interesting for the story. That said, Vegeta played a similar role to what Raditz probably would have been (coming to respect Goku, live more as an earthling and develop compassion).
Maybe Launch and Tien could have had a child who could transform by sneezing, thereby having two skillets (maybe one that's more of a support role and one that's a warrior, although that starts getting into JRPG territory. One could be noble and controlled, the other could be crazy but more powerful) or he could just use it as a disguise and sneak around.
Gonna ignore my typo