Doesn't really matter anyway
Mace takes Dooku, Yoda takes Palps Obi takes Maul, ANH Luke ESB Luke and ROTJ Luke will all lose from Vader, unless Vader knows Luke is his son then those Lukes will die..
Still if its movie Luke then Vader will still have to fight Obi, Yoda and Mace... He's not going to be able to do that
Btw: Reason I think Mace can take Dooku is because the last time they fought had to be at least 13 years prior to Rots, Mace had a lot of room to improve since then. I don't think Dooku improved as much.. And Yoda vs Sidious? Well we saw Yoda block Sidious his best and throw it back at him, he can do it again.
I think the real question is, are the very best Jedi's better then the very best Siths. I believe the answer in the movie times is yes. Maybe not in ancient times when the Sith lords were real Siths, but certainly in the movie times the Jedi's are stronger. The Siths only won with deception and betrayal, not in actual combat. In combat, the jedi's are better then the Siths.
So hands down, in your example, the Jedi's would totally rape those Siths.