How to deal with a co-worker who works 16 hours a day and makes the rest of us look like lazy bums? We simply refuse to throw our lives and health away to keep up with his absurd pace

We are a team of 4, the 3 of us have a healthy working schedule, except....him We will call him Z. Z is becoming a catalyst which may lead to us getting fired. Z finishes his tickets/features in 3 d

We are a team of 4, the 3 of us have a healthy working schedule, except....him We will call him Z. Z is becoming a catalyst which may lead to us getting fired. Z finishes his tickets/features in 3 days, these are tickets which require at least 2-3 weeks of programing. He does this by working insane hours, literally all day and night almost. He sends us messages at 4am with his new design and would completely disregard the design we worked on as a team, he would go to the managers during the morning reviews/briefs and tell them >"I cannot proceed to the next story/feature because the other 3 havent completed their part yet" We are at our wits end, even our lead hates this guy, makes all of us look like fucking lazy bums. We cannot go to HR because HR protects the company and this guy is producing at an insane pace so they will always take his side even if its unhealthy. we literally do not know what to do and are all secretly looking for a different job since we refuse to go with this absurd situation. Our dev lead talked to him about how this is unsustainable and even though hes productive, he will burn out. He just shrugged all of our advice and told us to mind our business. Send help, hes calling and its fucking 10pm. edit: Thank you all for the advice and valuable input, it seriously helps and I will try some of the popular advice posted below and share them with the other 2