A devil fruit tournament, which devil fruit here is the most all round useful and powerful. (TOP 3 MOST VOTES GOES ON TO THE NEXT ROUND OTHER GET ELEMINATED)

By most useful, do you mean in everyday life or in combat?

Not sure it matters as the Ope Ope No Mi is the most usefull for all situations. Depends on the user but the fruit has the most versitile power.

However for the record I belive other fruits are stronger and more versitile on a user to user basis but the Ope Ope No Mi is indesputably the most versitile of the fruits.

The Op Op Fruit also has the ability to grant eternal youth to one person through the Immortality Operation. So long as the user gives up their own life to do so. Because of this latter ability, the Op Op Fruit has be dubbed the Ultimate Fruit. On a side note, I voted for the Mochi Mochi Fruit.

I have to go with Ope Ope....

Its the most broken, outta of all those broken ones ...

Ope Ope and Gomu Gomu are at top 1 tier, i would put Yami Yami there too...

But still think Ope is above Yami, cause you need to make contact in order to cancel the powers what makes dificult against Ope