I hope you're not referring to Keirsey's Intelligent Roles. Because if you are your terminology is off.I think Vegeta is an istj. As was stated earlier, Vegeta is very TACTICAL. Contrast this with Piccolo, who is more STRATEGIC.
Vegeta is focused on the immediate situation and can lose track of the big picture. Piccolo can almost foresee events, and is usually the one with the most information. He's always the voice of logic and the one with the plan.
dont fuck with me, Vegeta is not INTJ! hes an INFJ, a badass one. hes like one of my childhood idols.
Frieza is an INTJ. All cold and calculating, stays in the back planning everything.
Vegeta is passional about battle and about his saiyan pride, he even cries before his death by frieza.