The surprisingly-non-terrible headshot is the one I'm using for my ink sketch, which is here on my desk at work.... some...where.

Yay!

I had never seen Turing and the Bus, and I think it's perfect.

Yes. He looks like himself. You can fullscreen it if you fiddle around with the settings.

It gets him in an excellent moment, even more so than the one I'll call, sans apology, Dorks in a Row.

On the other hand, I looked up the rightmost fellow in the front row because he had an interesting face and he turned out to be still alive.