Make the fighter pilots the women. Smaller average body mass and slightly better average ability to handle Gs should make them somewhat superior as combat pilots on small strike craft, and it avoids several cliches (female engineer, female weapons expert, etc.).
I recommend a tech geek as well, though that could be one of the other characters who doubles in the tech role as well; perhaps the Captain, which would be a bit of a change of pace from most sci-fi character lists, where the Captain is the rugged and manly type or the smooth ladies' man type or whatever. Avoid a Han Solo/Captain Kirk/Captain Piccard and you'll pretty much automatically get points for originality.
Consider also a synthetic or non-human character, and of course you need a token peach on the crew.