I'd go with the chain and truck idea, only don't use the axle. The tow hitch would be acceptable though. I've removed many a shrub in my yard by pulling them out.
If you soak the soil well before hooking up, many of the roots will come with it. Drop a soaker hose around the base and out to the drip zone of the shrub. Let it run over night and you should be good to go in the morning.
I really did not use the axle, but attached it to the frame of my Jeep and pulled out a whole hedge of yew bushes a couple years ago. Granted, I did need to chop the heavy roots with an ax first but for the most part they pulled out pretty easy.
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