In a business that burns through people quickly, Paul Shelley is a long-distance runner whose career has outlived most of the formats it was recorded on. The career now covers more than 57 years. The film 'Macbeth' accounts for more of the public profile than anything else does. 'Dot the I' rounds out the better-known part of the filmography. The first credits arrived long before the title most people know. Casting directors have gone to him for drama more than for anything else.