The 5 Elements in Naruto are supposed to be balanced, each with wakenesses and strengths, but the 5 elements are clearly not equally powerful. Fire Style, Water Style, Lightning Style, Earth Style, and Wind Style are very different, some being strong, others actually being weak. Lightning is the Strongest.
Let's rank all 5 Nature Releases using characters and feats as examples to how powerful each one of the basic Nature Transformations are in the Naruto series.