If I were you, don't try and judge all Lupin movies by just watching Cagliostro :/ I blindly bought one of the newer movies, Secret of the Gemenai and it so blah, and made me go -_-; with a part where the main girl (not Fumiko) was shirtless for a period of time for no other reason but, well of course, fan service :/ Seems to be a common theme for Lupin movies, I guess. Haven't seen Fuma Conspiracy though, but I'm guessing that one's decent?
I've also seen the only 2 TV eps that Miyazaki directed (and of course he had to add in that giant robot for Laputa). Those were pretty clean too, cause it's family-friendly Miyazaki^^ Well Mononoke as a small except with some violence, but either than that.
Oh and for more movie info, this page will be helpful (there's more english titles before the French/Spanish ones, whichever they be)
http://www.animenewsnetwork.com/encyclopedia/anime.php?list=L