What vocaloid has the most powerful voice?

I've heard answers like Rana or Flower, but who do you think has the most powerful voice?

MEIKO is a strong contender, same with Rin, but if you tune Yuki right, she can be insanely good! (I love Yuki's vocals-)

What do you think?

Fukase, Una (suprising, look at this!)

Miku V4 Solid, and thats really mostly it, this are my personal favorites besides MEIKO and VFlower

Om my goodness, I see your point, that's some really nice tuning on their end

And i just find it so weird and so cool at the same time because Una is a somewhat soft child vocal LOL

True, I don't hear a lot of people use her voice softly a lot though..

I do remember Luka back in the day used for some 'screamo' metal songs but i haven't kept up, i do like gumi's tone in most songs tho

What do you think?