Togekiss, sure. Sylveon, if you get a 5IV or 6IV, definitely.
I'd add Clefable if you're willing to train a Clefairy up to the higher levels before evolving it. It learns Moonblast (Lv.46, STAB) and Meteor Mash (Lv.50, Steel) and has some interesting attacking TM options if you don't want Meteor Mash or too many status moves. Avoid Poison opponents!
More Fairy types.