(both start Robert Beltran, who is more well known for playing Chakotay on Star Trek: Voyager)
Rock 'n' Roll High School (technically 1979)
Scanners
And a couple of movies I saw at a drive-in in 1981 or so:
Eager Beavers (I looked it up on the IMDB. It came up under a different name and is actually 1975. Not a single character has a last name--you know that's a quality script!)
Classroom Teasers (can't even find this one in the IMDB).
(These last two fall into the 80s category of crappy acronym movies, respectively B.O.R.N. and C.H.U.D. 180 minutes of my life that I'll never get back...)
The Blues Brothers (first SNL skit to movie, and probably the only good one)
Doctor Detroit
Airplane!
The Howling
Witches of Eastwick
Who Framed Roger Rabbit?
Raising Arizona
Videodrome
Ultimately, though, the 80's will be remembered for introducing the concept of sequelitis, where we take a film that did pretty darn good then proceed to beat the exact same concept to death over four, five, even six parts.