Like I and others keep saying it's all just simpler if you write the ST films off as the superfluous add-ons that they are. Want the conclusion to the Star Wars saga? Congratulations! You saw it in 1983. Or alternatively you saw it in 1977. ESB, although the best individual movie by the reckoning of a large portion of fans, can't really be considered any sort of conclusion with its cliffhanger ending - hence if you don't want ROTJ, you have to go no further than 1977, Star Wars, done.