While we can’t honestly classify most of it as “real,” we admit that we’ve been hopelessly hooked on reality TV for, oh, about a decade and a half now. In honor of the 15th anniversary of Survivor (the show that kick-started the reality TV revolution premiered on May 31, 2000), we’re celebrating our favorite reality TV personalities in eight categories… and letting you pick the winners. Be sure to vote in the poll below — and if we left out your favorite, feel free to submit a write-in vote in the comments. Today’s category: Heroes.

Diem Brown, The Challenge (eight assorted seasons)

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Why She Makes the Cut: Diem was so much more than a fierce, fearless competitor on The Challenge; she was nice. She approached — or at least attempted to approach — each fellow Challenger with kindness, even when cattiness and drama seemed to rule the day. But that was just the beginning of the dancing queen’s impact. In November 2014, Diem succumbed to her third bout of cancer, leaving behind her patient gift registry website, MedGift, and a whole bunch of fans inspired to live their lives to the fullest.

Best Moment: No one will ever forget Diem’s romance with bad boy C.T. Tamburello, but reality television was forever moved when Diem finally took off her wig and revealed her beautiful bald head (and, yeah, we’re crying now just thinking about it).

— Breanne L. Heldman

Jo Frost, Supernanny (Seasons 1-7)

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Why She Makes the Cut: Let’s get real: Most parents aren’t taught how to be parents, but Supernanny Jo rode to the rescue with real, practical advice for those ‘rents whose households were often completely out of control. With the patience of a saint, yet the ability to be completely honest in pointing out the mistakes being made, Frost — whose background includes a 15-year stint as a real nanny — saved many families from a miserable home life, and some parents, it’s no exaggeration to say, from losing their sanity.

Best Moment: Example: the McMillion family, with mom Cheryl in a fragile state thanks to three out-of-control boys and a military husband on deployment. Cheryl was so beaten down by having to be the sole disciplinarian that she had taken to locking her kids outside and locking herself in a room away from her sons, and told Jo, “I’m at the point where I can’t stand my kids.” In came Supernanny to the rescue, with the Naughty Spot, a treasure hunt, and, of course, a set of rules implementation and communication techniques that led Cheryl to be able to bond with son, Ryan, who had, pre-Jo’s visit, told his mom on a regular basis that he hated her.