It's a good movie but the world wouldn't really be a dark place without THX 1138, American Graffiti is a good movie and Star Wars is well... Star Wars, but those 3 movies don't put Lucas on a Top 10 list for sure.

George Lucas is an absolutely brilliant businessman and hustler, he's incredibly wealthy but directed less than 10 movies in his life, Martin Scorsese and Stanley Kubrick and such are definitely much better directors but had to basically give their entire lives to films to become recongised and rich, George Lucas just basically cashed out on an entire franchise and has pretty much sat comfortably for the rest of his life.

Other than Red Tails, it's a shame his last 3 movies are actually utter shit.