I wouldn't really consider any of them to be home runs really.
Star Wars and Empire are great, Jedi really isn't, it sticks the landing just about but as a whole its not in the same league as the first two.
Raiders is a masterpiece, Temple of Doom is a big step down, and Last Crusade is just kinda average.
BTTF isn't exactly a trilogy; there's the first movie and the second two are basically two parts of a lengthier sequel. Which is why the quality is more consistent, but I don't feel like either adds much to the original.
On balance Star Wars has to take it because its the one with two bona-fide classics, and actually adds up to a proper trilogy narratively.