Carnage!
That I agree with. Would like to see Raditz as a Super Saiyan also.
And Bubbles on a King Kai stage.
I considered him! But I wasn't very familiar with the movie he's in. He would take up the 8th spot on this list though.
I say his Final Form so he doesn't look exactly like Frieza all the time. This way both look unique to someone who may not be into Dragon Ball.
Switch the GOAT, amirite?