There's a Harrier in Area 88, and I think a Lightning as well.
If you want non-descript planes, but good action sequences, Sky Crawlers is out soon, well worth it for the pretty.
EDIT: Not a Lightning, a Crusader... I get those two mixed up. But there is an ep later on with a Buccaneer
EDIT AGAIN: If you're into old school airplanes, then there is a Swordfish in Cowboy Bebop: The Movie!