Dennis Hopper, 1936-2010
I was very sorry to hear this. I've liked a good many of his roles since Easy Rider, but I think my favorite was King Koopa in the Super Mario Brothers movie. To any adult watching that movie (Hey, I had kids, okay?), it was obvious he was having a great time with the role.
RIP, Dennis Hopper. You were some of the greatest bad guys ever.