Jean Grey
Jean Grey is one of the original X-Men, and she’s  a force to be reckoned with, even without the Phoenix Force. As one of the Marvel comic book universe’s most powerful telepaths and telekinesis users, Grey is more than an Omega mutant, the most powerful a mutant can be without outside intervention. According to Mister Sinister and Dark Beast, she’s an Alfa mutant, the most powerful mutant ever.
This puts her in an entirely different category from that of anyone mentioned on this list. In addition to her reputation as the most powerful telepath among the mutants, her ability to manipulate psychic energy, and her god-like telekinetic abilities, Grey is also adept at hand-to-hand combat. However, she prefers to use her other abilities to defend herself.
She might just be the most powerful superheroine on this list.
In the X-Men movies, she has been portrayed by Famke Janssen and Sophie Turner. Although the true extent of her powers has never been shown, maybe X-Men: Dark Phoenix will explore them.
