Who is the most powerful in Dragon Ball? Who is supposed to be the highest-power character in the Dragon Ball series? Is it Lord Beerus, Gogeta SS4, or somebody else?
The most powerful character in the Dragon Ball universe, currently, is Whis, Beerus' assistant.



This is stated in an interview with Akira Toriyama, the creator of Dragon Ball:


  I suppose if Beerus’ strength is a 10, [Super Saiyan] God would be right about 6. [...] Incidentally, I guess Whis would be about a 15.