Originally posted by thesithmaster
Depends.
In Legends, Anakin won.
In Canon, neither of them, really. Bane's Sith Order died at the hands of Anakin, but the Jedi+New Republic got absolutely streamrolled by the First Order that, while a Dark Side organization, is not Sith.
Bane's Sith Order had died long before Vader killed Palpatine.
Some time later after killing Plagueis; Palpatine created his own Rule of One.