The Oxford translation of Aristotle's works, edited by W.D. Ross -- the standard complete English Aristotle.
Aristotle studied under Plato for twenty years before founding his own school, the Lyceum, and his surviving works read almost nothing like Plato's dialogues -- dense, systematic treatises covering logic, physics, biology, ethics, politics, poetics, and metaphysics, apparently closer to lecture notes than finished literary works. What survives is itself a matter of accident: most of what Aristotle actually published for a general readership is lost, and what remains are the more technical, in-house teaching texts, which is part of why Aristotle can read as dry compared to Plato's dramatic dialogues despite covering nearly as much intellectual ground. The Oxford translation under W.D. Ross's editorship, published 1908-1952, remains the standard complete English Aristotle used in university courses today.