8. Android 18
Like literally almost every other character on this list, and indeed in the franchise as a whole, Android 18 was first brought into the storyline as a cold, calculating villain. Along with her brother, she laid waste to the entire world, even managing to wipe out the Z Warriors. How could we possibly survive, now that Goku was gone? And Gohan was felled? And Krillin had died for the thirtieth time?
By making the interdimensional trek back in time, Trunks was able to prevent this tragic turn of events. And eventually, Android 18 realized that the planet was perhaps more valuable than she had given it credit for, seeing the light of day and the apparent appeal of a diminutive bald man. There is a distinct lack of powerful women in the echelons of Z, but our girl Lazuli (her real name, which also sounds like a delicious pasta dish) bucks that trend. She suffers no fools, and routinely steps toe to toe against even the mighty Saiyans. For this reason, she is a definite contender amongst the strongest Earthlings, a frequent point of debate amongst the fans. Our vote, however, goes to Puar.