Well, seeing as how you nearly all my favorites (Buckaroo, They Live, Valley Girl, etc.) I'll throw ina couple I think got missed. How about:
Space Hunter: Adventures in the Forbidden Zone (to my knowledge was the first film Molly Ringwald was in)
My Chaueffer (Deborah Foreman)
April Fool's Day (Deborah Foreman)
Runaway (Tom Selleck / Gene Simmons)
As for kids movies, I don't recall either of these being listed:
The Great Muppett Caper
The Muppetts Take Mahatten