This is some sad news.
I was never a huge Corben fan until I read The Crooked Man, and that's when his work clicked for me. I wasn't hugely versed in his work up to that point, either. I'd come across it in various anthology books. I didn't dislike it, but TCM was where I really saw what he did, and how effective it could be. Been a fan ever since.
He was still, at 79/80, actively producing work, too.
Rest in Peace, sir.