"... involving wrenches, very small amounts of penetrating oil, etc." These may be more heroic measures but certainly not reasonable in any sane world.
Next time remember a screw on filter doesn't require extreme tightness to work! The problem is you can't get even torque on the filter ring. This causes some places to actually tighten up more the more you try to remove it.
"Not even the rubber band trick will work." I am not surprised. You need something more substantial than a rubber band. But the approch is correct. There are cheap filter wrenches you might try. Those rubber jar lid kitchen aids work too.
If it is still really stuck try a screw hose clamp of the appropriate size. It gives you a much better grip. You can get one at Ace Hardware or an auto parts store.
"...penetrating oil..." OMG 
