The Dark Lord of Europe from around 1930-1945, when he was defeated by Albus Dumbledore.
In the books, he is described as a young, handsome boy with golden blond hair at 16, and as an old, frail, skeletal man with sunken eyes at the end of his life.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...