Luke loses. Badly.
Please... could you possibly change this thread, or at least clarify on the incarnations of the characters? Thanks ^^. Because DE Sidious could put up a tough fight against Luke- saber-wise, he actually might be slightly superior, but Luke, then again, is the simple incarnation of light side godliness and being overpowered.
ROTS Sidious is the strongest sith lord in history. IN HISTORY. That includes Krayt and Caedus later on... which... err... makes no sense, because Caedus was almost as powerful as Luke, but Luke should generally beat ROTS Sidious... oh hell.
Yoda- one of the best fighters in the history of the galaxy, an extremely potent Jedi with extreme lightsaber skills equal to ROTS Sidious' (arguable) and extremely powerful usage of the force. He has extreme experience, and, after Luke, is the strongest Jedi in history.
Nihilus has powerful force skills, but other than his drain- which Luke could probably somehow destroy by some weird crap. Other than that, he's an unimpressive Sith Lord with barely decent lightsaber skills.
Bane is probably the second strongest Sith Lord after Sidious, and is extremely skilled in lighysaber combat and in the dark side of the force.
Is Sidious allowed to Force Storm Luke and kill him instantly? Or is it ROTS Sidious?
Anyway... I'm not in debating mood at the moment (might change soon, tho ^^) but ROTS Yoda and ROTS Sidious together would probably beat Luke.
Personally, I feel that Luke is the strongest ever because of his insane force powers- his saber skills, while good, aren't something well beyond everything that we've seen. Bane, Yoda, and Sidious can all put a VERY good lightsaber fight against him alone and can possibly beat him in exclusively lightsabers.
So... is it DE Sidious or other Sidious? Anyway, Luke loses.