Which poet was "mad, bad and dangerous to know"?

Byron became a celebrity with the publication of the first two cantos of 'Childe Harold's Pilgrimage' (1812). "He rapidly became the most brilliant star in the dazzling world of Regency London. He was sought after at every society venue, elected to several exclusive clubs, and frequented the most fashionable London drawing-rooms." During this period in England he produced many works including The Giaour, The Bride of Abydos (1813), Parisina and The Siege of Corinth (1815). Involved at first in an affair with Lady Caroline Lamb (who called him "mad, bad and dangerous to know") and with other lovers and also pressed by debt, he began to seek a suitable marriage, considering - amongst others - Annabella Millbanke.