At risk of outing myself as an Anglophile--and of then being shunned by true Brits for saying this--but I rate LeCarre with Anthony Burgess, high on my list of favorite authors. Coincidentally, Burgess took a swing at a spy novel (and at LeCarre and Ian Fleming). Worth a read for fans of the genre.

https://en.m.wikipedia.org/wiki/Tremor_of_Intent:_An_Eschato...