I was lucky enough to see him as Claudius at the RSC in 2008. It was a great cast but he acted everyone else off the stage, mostly just by standing there. I've still never seen presence like it.
Raising a glass to the mighty Patrick Stewart. So many great performances that it’s ridiculous to pick just one, but my god he was magnificent as Sejanus in I Claudius, that towering classic of television’s golden age. We shall not look upon his like again.