I had never heard of him before watching the documentary about him, just three days before he died. It's mainly just him talking and is excellent -- he really had star quality, ironically. I'm therefore pretty sad to hear this news.
Well son-of-a-gun: I thought I started a RIP thread on Jack a few weeks ago. Guess I didn't. I happened to watch the Wrangler doco as well a few months ago and found it quite interesting. RIP, Jack.