Sir Larry Wildman invites you to shove it, but regardless, Shannon was not a star when he appeared in GHD two decades ago. He was clearly outshone by the impeccable timing and deft touch of the aforementioned Stephen Tobolowsky.
Sir Wildman's British accent proved that he was so out of place as the leader of the Kryptonian army. On Krypton, everybody spoke perfect American English because of thousands of years of evolution had led them to speak the perfect dialect of the perfect language.
Many were confused when Wildman/Stamp/Zod screamed at Jor-el that some day he would take revenge on his "ass" rather than his "heirs," a problem which I'm sure was lost on you because you immediately went into Bevis and Butthead mode because you were certain he said 'ass.'