Magneto is a more powerful Elemental that Storm which nullifies the argument of her being the best/most powerful elemental. That was my point.
Now back to Iceman and Storm.
Iceman is a better Elemental because he has a better control of his single element. Storm can manipulate the weather but she will never have the same degree of control over singular elements as Magneto, Iceman, Magma, or Winddancer.
She can do some amazing things sure but never to the extant he can do them. She is a Jack of all trades but master of none. Sorry but it's the truth and it doesn't lessen her as a character because of it.
She's the mistress of all the elements, she can do anything all the others can and even better. There is a reason why she was worshipped as a Goddess and Iceman was almost lynched by a mob