Bernie Madoff is another standout example, and the many scams in the supposedly expert world or wine, such as Rusy Kurniawan.

https://en.m.wikipedia.org/wiki/Rudy_Kurniawan

I watched a documentary about this guy (though I can't remember the name). What a totally fascinating story! The fact that even today there are people who think that he wasn't involved in forging wines really speaks to how easily and thoroughly people can get caught up in a convincing lie proliferated by a convincing liar.

Sour Grapes I believe.