Crassus?
In 1960, Sir Lawrence Olivier's was Crassus, the primary antagonist. Olivier portrayed him as a virtuous and patriotic man of his time, if somewhat uncharismatic and unloveable. Olivier's Crassus was the quintessential Roman aristocrat.
I strongly disliked Angus MacFaddyen's portrayal of Crassus. MacFaddyen is a fine actor, but his Crassus comes of as a foppish psychopath. The facial expressions are overblown, his voice and dialog are almost effeminate, and the very un-Roman facial hair makes him look more like a Romulan from Star Trek than a Roman. I am not comparing him to Lawrence Olivier, but I may be biased by Colleen McCullough's characterization of Crassus in her "First Man of Rome" series of novels. In them, Crassus is physically massive, quiet, slow and deliberate of movement, almost "bovine" in his expressions. But his appearance an mannerisms conceal a very cold, calculating, and logical man. Ms. McCullough put a decade of intense research in developing her characters and story, so perhaps Crassus was preconceived in my mind. In comparison, MacFaddyen comes off as a whiny spoiled brat.
Mark Addy probably would have been a better choice for the role. He is physically large and "bovine", has a real English accent (LOL), he is roughly the same age as MacFaddyen (and Crassus at the time), and has a darker complexion and a more "Roman" appearance. He can also be quite imposing when he's not laughing. Overall, MacFaddyen spoiled it a bit for me.