In the age of Peak TV, where most shows are lucky if they’re able to secure a second season, Grey’s Anatomy has not only survived for more than a decade and a half, but it surpassed ER to become the longest-running medical drama in television history. ABC has already renewed it through Season 17, even though the 16th season is still wrapping up. The show’s longevity is a testament to its remarkable creative team, who continue to produce gripping, complex, and deeply resonant stories.

The success of Grey’s is thanks to its great scripts and the charismatic ensemble of diverse faces that bring those words to life. Where would the show be without Ellen Pompeo, an emotional alchemist who can twist, bend, and manipulate our feelings to her will? Or Chandra Wilson‘s fearsome but lovable Miranda Bailey, who commands the interns as much as she does the screen?

Many have come and gone over the course of the show so far, from ambitious know-it-alls to heartbreakers to (several) bad boys with gooey centers, but not every doctor has left a permanent mark on Grey Sloan’s bustling halls. With plenty of names to choose from, we’re highlighting the most unforgettable medical professionals who’ve made Shonda Rhimes‘ groundbreaking medical drama must-see TV for 363 episodes and counting. Here are the 52 best Grey’s Anatomy‘s doctors, ranked.

52. Robert Stark (Peter MacNicol)

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Peter MacNicol, Grey’s Anatomy

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Not to be overly dramatic, but this guy was the worst. Stepping in to replace Arizona Robbins, who went to Malawi, he rubbed pretty much everyone the wrong way with his sheer laziness and penchant for taking credit for others’ work. It’s not that Stark was incompetent, per se, but he was more concerned with being right than helping his patients, and as a result, he often clashed with his co-workers and resorted to unnecessarily extreme measures in the OR rather than listening to better suggestions.

51. Shane Ross (Gaius Charles)

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Gaius Charles, Grey’s Anatomy

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Not even Cristina’s high regard for Shane can make us like this arrogant doctor who essentially got away with murder after he lied to Heather Brooks, which led to her horrific death.

50. Intern Pierce (Joseph Williamson)

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Joseph Williamson, Grey’s Anatomy

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