With Vaders new cannon feats, I retract that belief; though IMO he's still not far behind. Thats beside the point here, though. People here imply that novel Meetra and Scourge > the protags fighting together. It's laughable. While he didn't win, he still held them off handily for a good while. Neither of them are as powerful al any of the Force using protags. Again, it's laughable to consider that they could compare to Malgus.
Galen has contended with Vader's strikes who should be at the very least an equal to Anakin. Galen also beat a version of Vader who has all of Anakin's knowledge and experience along with years to have reworked his form to suit his cybernetics. Vader should honestly be more skilled then Anakin by this point. This is all without mentioning Galen's superior force abilities.