Sith Lord Vader next GL?

So just a question for those who are beyond convinced it is anakin. Who does he beat out of the five other gls. I would expect lose to two, beat two, with one evenly matched. To me jmk and see seem to be the obvious candidates of lose to, jml draw (Vader and Luke both decide not to destroy the other though they could have albeit Vader is letting emp do it) which leaves rey and slkr as the gls Vader beats. If you agree with this are you happy with it? If you disagree who do you think he beats and why?

It might be Vader hell probably is but a rots era Vader seems like the lore would dictate a weakish gl that would be completely unsatisfactory to me.