Basically the only Imperial minion who completes his mission successfully and doesn't get Force-choked to death. He's the commander of the AT-AT assault ("The shield will be down momentarily, Lord Vader,".

Julian Glover is also, of course, an immensely respected and talented Shakespearean actor who distinguished career will likely be completely overshadowed by the five lines he had in a STAR WARS movie thirty years ago, but that's how it goes He was also in DOCTOR WHO twice, as King Richard the Lionheart in a 1965 story with William Hartnell but more memorably was the main villain Scaroth in the 1979 Tom Baker story CITY OF DEATH (written by Douglas Adams), sometimes regarded as the finest DOCTOR WHO story of all time.

Glover is also good friends with Roy Dotrice, the reader of the ASoIaF audiobooks, and stepped in to replace Roy at short notice as Pycelle after he was taken seriously ill.