I'm a fan of Kurt's too, he's excellent in The Thing and the rest of his work is solid enough - currently enjoying his turn in Unlawful Entry. Jeff has the edge though, thanks to his tremendous range and effortlessly cool persona. He has the ability to play goofy, threatening, obnoxious, haunted, suave, heroic etc with ease and, whichever hat he has on, remains immensely likeable and highly watchable. As mentioned in the Bridges thread often putting those sharing screen time in the shade. Arlington Road and The Fisher King are favourites of mine and I also enjoy The Vanishing (both his performance and the film). Haven't seen the original yet which I know is widely considered superior.
Btw, a poll's a great idea... I tried to see how to add one but couldn't figure it out
Any help appreciated.