His hard features and intense blue eyes make Ed Harris an unlikely prospect for leading man roles, yet this award-winning stage and screen actor brings the requisite strength and conviction to the parts he plays. The New Jersey native began his career on stage in California in the mid-1970s, where he quickly earned a reputation for his talent and intensity. Harris moved into features with a small part in "Coma" (1978) and offered an impressive turn in his first leading role in George Romero's "Knightriders" (1980), an underrated modern spin on the Arthurian legends. Three years later, though,