I don’t watch a lot of movies. I can only think of two with Clooney in them that I have watched. The one that sticks in my head is O Brother Where Art Thou.
“The Peacemaker” was pretty good. I liked the nuke detonation the best but there was lots of action and Clooney made a pretty good SF guy.
He also played in "Ocean's Eleven," which I really enjoyed. It was certainly the movie and the script; I'm sure a lot of actors could've played the part just as well.