Obviously Uridium.

Migges was one of my heroes back in my early C64 days, before I learned programming. Always impressed with his intros, demos and cool style. German, I think. Remember he left the C64 for AMIGA really early, right after the Amiga 1000 came out. He made a farewell demo before doing so. Think it was the first 'farewell demo' of it's kind. Many followed, like Triton Techs 'The Funeral'.