For modern Servants, I recall reading an amazingly strange one of Foreigner Henry Kissinger where he inadvertently contracted with Hastur and had a dream-journey becoming Defense Secretary of Carcosa. It was bizarre and in honestly very bad taste but still memorable enough I was kind of impressed by it (and the idea of a war-strategist who ends up earning the favor of an evil god by being so fixated on military logistics he doesn't go insane upon perceiving its incomprehensible nature actually struck me as rather interesting if a less... loaded figure was used for it).