I Need A Non Dorky, Evil Name?

Make one up yourself and have fun with it. As long as you pretend it's not dorky, it won't be. Kind of like Jk Rowling's Voldemort. If you heard any normal person with a name like Voldemort, you'd probably laugh. I know I'd laugh really hard. But Rowlings makes it work. She puts the right inflection on it and makes all her characters terrified of the name, and so, because of that, we're terrified of it as well. It's the way you work the name into your story that makes it un-dorky. So, just make sure you have fun making one up and it will all be good.