naw you got it wrong
the strongest dragon is
the fisrt dragon after absorbing the 7 dragon balls
so if anything shenron is cause he is the only one that goes evil and kills, he was even strong than goku and vegeta as SSJ4 they would of beat him as gogeta but the fusion only last 10mins not 30mins
oh and get this the way goku won was gathering energy from everywhere in the universe and use it as a spirit bomb it was like in 5mins and the gewnki dama was completed and thrown
and deverz is so sexy look at this
The fat must help regulate his enourmous power,thats why buu is so fat~krillian