Maiden of Pain, Hathran, Thrall of Malachant, that one drow prestiege class that lets you raise zombies with no HD limit. All classes with full casting and powerful abilities that are tier 2 at least.
To this date I have found TWO prestige classes with male only requirements, the thrall of the demon of frost giants (which is melee based, and weaker then just playing a half-minotaur), and the BOEF "Harem protector" which requires you to be castrated to enter.
So yes, overall females are more powerful than males in terms of D&D. It's not much so there is a technical statistical advantage to playing a girl instead of a guy.