So with Fairy type being super effective against Dragons, what will be super effective against Fairy?

Surely it has to be Poison and Ghost.

Poison is only effective against Grass and that's it. They can be so great as well, Poison Jab and Sludge Bomb need something else to be super effective against.

Ghost Pokemon are terrible because of their effectiveness. Only Psychic and other Ghosts, as well as being completely buggered by Dark moves, which is annoying seeing as everyone seems to be able to learn either Crunch, Dark Pulse, or Night Slash.