Strongest group of four that DE Sidious can kill
DE Sidious is sitting in his chambers where he had his duel with Mace. You can make any group you want, with whichever Star Wars characters you want but in the end they aren't powerful enough to take on Sidious. And since there is a notion for a limit at four, let's make it that way.
The person who has the strongest group out of the others wins.