Imo you can't go wrong with Luigi Cozzi's
Starcrash.
A typically hot Caroline Munro looking sexier than Princess Leia ever could, Marjoe Gortner as a poor man's Luke Skywalker, The Hoff sporting eyeliner, Christopher Plummer as 'The Emperor Of Space' and Joe Spinell as the villainous 'Count Zarth Arn'.
I'm also sure i saw
The Beast In Heat himself Salvatore Boccaro in a blink-'n-you'll-miss-it part as a primitive caveman-type.
What's not to like?