It's tricky as to how to classify who is jedi & who is Sith since there are so many crossovers. For example, I think StarKiller would smoke Legends Luke... but StarKiller was a Dark Acolyde most of his life & only considered himself a jedi in the end.
Not sure how much more training Luke got in Canon, but he had about a day's trip with Obi... & 3 - 6 months on Degobah with Yoda. That said, he had tremendous natural ability & I'm sure he worked on himself up to ep. 8... but to say he bests Yoda is a hard sell for me. Never hear of force lighting from Luke. The bi-location was a nice show of power from Luke, but that doesn't top force lightning imo.
Even canon Mace Windu would be an interesting topic as the only Jedi to be able to handle lightsaber form VII without falling to the dark side. He couldn't do the force lightning, but he could catch it with his light saber & re-direct it.
I can't even touch the strongest legends Sith atm without many hours of research, but the one's you brought up are certainly worthy. Sidious is an obvious & "cookie cutter" addition to the list, but his legends abilities & immersion into the dark side were equally as impressive as many of these other powerhousez. He could tear apart the fabric of space itself. To complicate the discussion further... StarKiller bested Sidious at one point in combat.
It's a huge subject trying to pick the strongest. My mind is swimming just thinking about it. perhaps another time as I am running out of it atm...