Sad to say, but I actually think Rey might win. Darth Sidious was supposed to have created Anakin. Rey is Sidious' natural descendant. I figure that if Sidious was powerful enough to create Anakin, and, if that power passed to his descendants, his descendants would have power enough to create an "Anakin." A confound to this theory is that the bloodline may be muddied by the parents from outside the Palpatines who parented Rey and perhaps Rey's parents with the direct descendants from Sidious. But, for that matter, Anakin had a mother, and she had to have muddied the waters a bit herself.
