Costner v. Cruise
I gotta go with Cruise: every time I look at him, I think "Scientologist freak." At least Costner did "Field of Dreams" and "Bull Durham." Cruise doesn't have anything nearly so redeeming on his resume. (With the possible exception of Mimi Rogers. Mmmmmm. Of course, Rogers is herself a Scientologist and apparently recruited Cruise into that cult.)