Usually Moondragon. She easily killed a Thanos clone with greater psychic power than Professor X, and her powers almost mentally overwhelmed Galactus, whereas Professor X could barely rouse his attention during the Secret Wars. Psylocke was no match for her whatsoever during Infinity War. She also controlled the population of a whole planet, which is far beyond Professor X, Emma Frost, Psylocke, and Kid Omega. X-Man at full potential and Phoenix Jean would likely outdo her telepathically though.