Step 1: Concept Overview:
'Negative Capability' describes an artist's ability to seek beauty and truth, even amidst uncertainty, without demanding concrete facts or logical explanations. [4, 9, 16, 22, 26]
Step 2: Elaboration:
John Keats originated the term in a December 1817 letter to his brothers, George and Thomas. [4, 9, 16, 22, 26] He cited Shakespeare as the embodiment of this trait, suggesting that a skilled poet adopts diverse characters and viewpoints without enforcing a fixed philosophy. While Coleridge, Wordsworth, and Byron were Keats's peers, Keats specifically coined the term.
Step 3: Solution:
The correct answer is John Keats, option (3).