The Witcher Characters: Books Vs. Games Vs. Netflix Show
2. King Foltest
When it comes to the books' Foltest, the king is presented as the Jaime Lannister of The Witcher. He is described as "slim" and having a "pretty - too pretty - face" and also has the odd habit of sleeping with his sister, those two elements alone should solidify any character as the Jaime equivalent.
While lacking the "pretty" face (depending on what you're in to), CDPR's Foltest is practically what one would expect from the brief description provided by Sapkowski. The show's version gives Foltest a more traditionally kingly appearance, likely to match his more muted and mannered on-screen persona, as opposed to the more petulant eccentricities of the iterations seen in the books and games.