The janitor from the Breakfast Club. Or even the teacher. Or John Bender... hell there are 5 or 6 characters from that movie alone that you could dress up as with just normal clothes. I guess it's kind of obscure, but at least you'll be comfortable and not a party-pooper (no costume). Those are the two main goals of a Halloween costume as far as I'm concerned.
Marty McFly, Max Headroom, Axl Rose. BA Baracas is always a winner if you commit (aka "get the haircut").
An 80's themed Halloween party is a good idea.