He's actually probably the least divisive, unless we're including people nobody's ever heard of.
Also not sure what difference it makes whether he fits anybody's definition of "retired" or not. I don't think anybody actually cares if he's still saving money by doing his own yard work, or earning passive income from his blog. The point is that he attained the option of retiring at 30, which is true.
Whether you consider how he chose to live his life after that point "retirement" is kind of subjective and irrelevant.