Tien.
The fucker has three eyes and knows a technique that gives him two extra arms. What other character in Dragonball could do that?
Save for the Tienshinhan Arc of Dragonball, he didn't do shit later on, but he really would've been great fighting on Namek.
AzureDragoonGX
Yet he got his ass kicked by Vegeta and his buddy (i forgot his name) in DBZ Kai... just saying.