Stuck wheels are a common occurance. I ran into them several times a day when I worked in a shop. My usual approach went something like this:
-Thump tire with fist.
-Kick outer sidewall
-Chuck Norris roundhouse kick inner sidewall. By this point 80-90% of wheel have come loose. (Note: Put a lug nut back on a few threads first to keep the wheel from sailing/bouncing across the shop)
-10 lb deadblow/rubber sledgehammer to the inner sidewall.
-Same hammer to the inner lip of the rim.
-Inform owner wheel may not survive.
-Get 12 lb steel sledgehammer.
I've only made it to the steel hammer stage twice. One was the rear wheels on an F-350 dualie. By this point we had exhausted everything that avoided metal-metal contact including (with the owner's permission) driving around our parking lot with the nuts finger tight, bumping the tires into curbs at moderate speeds. The final outcome of that one was a chisel between the rear wheels and a BFH, followed by new rear wheels.