First, let me apologize for naming Queen Elizabeth II as an ostimate; apparently, I was wrong. My source was an ostomy nurse (now deceased) who was a mentor of mine. So, I thought it might be fun to investigate the subject again. For reasons that should be obvious, it is difficult to find out much about anyone famous who has an ostomy, as their privacy is paramount as long as they are alive. In addition, I do realize that not all sources across the internet are reliable, but I have done my best to pick sources that at least seem to be credible. For some reason, I could not open this link on my Pixel phone, but I have no trouble opening it on my iPad.
I don't know how much success you will have.
But I will post a screenshot for you.
Celebrities that live with a stoma bag
https://medicalmonks.com/os-resources/celebrities-that-live-with-a-stoma-bag/
Matthew Perry in GQ tells about his stoma stories
https://www.gq.com/story/matthew-perry-men-of-the-year-2022
Celebrities with a stoma bag
https://www.tsmp.com.au/blog/celebrities-with-a-stoma-bag.html
And yes, George Clooney
https://qa.answers.com/general-arts-and-entertainment/Does_George_Clooney_have_a_colostomy_bag
As I said in response to a number of queries about this, the fact that George Clooney has never, that I'm aware of, publicly stated that he does not have an ostomy after this incident occurred, I think speaks volumes. I've seen publications that state it was a misinterpretation of something he stated later, but this episode of The Graham Norton Show happened earlier than the statement that they are talking about. I think at this point, he just would prefer people not discuss it.
https://en.m.wikipedia.org/wiki/Beverly_Polcyn
As a nurse, I would never divulge direct patient information on someone who was alive unless they had given me their permission; in one case, this was so. Comedienne, dancer, and character actress Beverly Polcyn was a familiar face to me from movies such as Hook (line: "Smee!") and Legally Blonde (watch carefully during the bend and snap sequence), and she played a wonderful dramatic role in the final episode of ER and lots more.
She had an early ostomy with a takedown surgery twice, and I had the honor to be her ostomy nurse; she was an amazing human being and so fit even in her '90s. I asked for her to roll on her side so that I could look at her heels to make sure she wasn't experiencing any skin breakdown, and she kicked them up like a can-can girl. There isn't much she wouldn't do for a laugh. I asked her permission to share the fact that she had dealt with an ostomy, and she said that it was all right as soon as she had her takedown surgery so that she could tell people she didn't have one anymore.
Unfortunately, she had to live through this remarkably fun procedure twice, having had the successful takedown and then having a recurrence of her condition, causing her to require another ostomy and eventually another takedown. (Takedown is a term for an ostomy reconnect or anastomosis)