What could be cooler than being considered the ‘King of Rock and Roll’? When Elvis was introduced to one of his favourite singers’ daughters, Dean Martin, he told her, “They call me the ‘King of Rock and Roll’, but your dad is the ‘King of Cool’”. There can’t have been anything at all cooler to her in the world right then and there. Whether he was rocking his jet black quiff with a pink checkerboard blazer and a pair of two-tone shoes, his gold…