Tiger Woods
Nobody can accuse Woods of being an angel but they can respect him for one of the greatest comebacks ever. The legendary golfer was on top of the world before it all came down around him. His sex addiction and prescription drug problems came to the fore in a massive scandal. In the end, his wife left him with their children after it emerged that he slept with dozens of women.

Meanwhile, this coincided with an increase in injury problems including stress fractures and a torn ACL. These turned him into a shadow of his former self for most of the 2010s. It was incredibly frustrating for arguably the greatest golfer ever. But Woods turned back time in 2019 when he won the Masters (via Reuters).