How accurate are television depictions of real-life people? It's always hard to capture the exact look of someone. Spirit is much easier to encompass for actors. That said, TV shows do a pretty great job of costume designing actors based on their historical and/or notable characters. Here's a quick rundown of some modern depictions of historical characters and how they compare to the real thing.
The 'Assassination of Gianni Versace: American Crime Story' Characters and Their Real-Life Counterparts