I just have to say that to me, Strahd is not and never will be "The Vampire." That award will always and forever go to Matthew Maule, a.k.a. Mr. Strangeways, a.k.a. Thorn, a.k.a. Vlad Drakulya. (And Sherlock Holmes' cousin.)
And the things that make him iconic have nothing to do with his freaky vampire powers and everything to do with his personality: old-world hospitality and charm, a dedication to lifelong learning, decisive action and a willingness to take responsibility, and a complete disregard for fear even against things (crocodile gods and ancient enchantresses) which have him completely outclassed.