I don't consider 'Taker retired. He may only wrestle once a year, but that's enough for him to be called a part-timer IMO.
Is Vince considered to be retired? I mean, he doesn't make very many appearances and hasn't been active in the ring in a while, yet I'm sure he probably still has most of the say in how things happen. If he's not considered retired, he's who I would pick.
And FTR, Bryan's not going anywhere. He's still got at least another 2-3 more WWE WHC runs in him if not more...bunch of damn idiots in this thread.