The world's biggest liar, possibly. It's insane to me that laws and regulations haven't stopped him from lying to investors and the public, but that's the world in which we live.
The SEC didn't even enforce the whole he can't run his twitter account punishment for tweeting that he took TSLA private at 420.
Just look at Nikola.
An example of a lie would be the topic at hand, misrepresenting current capabilities of an existing product.
Mars or self driving cars by Year X isn't a lie.
Though some of his future predictions are obviously things he knows will not possibly happen and are as close to a lie as you can get while still being plausibly deniable.
Or about the thai diver being a pedophile.
People just give Elon too many benefits of the doubt. Saying Mars/Self driving cars is going to be next year for over a decade is just a lie after the first couple of times.
Anyone who can’t see that hasn’t been paying attention or is in denial, taking the lies at face value.