I would run away with Cary Grant. After him, I'm fickle. If I like the book or film, I am temporarily in love with the hero. If he's my leading man, I'm definitely in love.
A few standouts:
Ben Browder's character, John Creighton, in the sci-fi Farscape series. (Miss it.)
Jim Caveziel in The Count of Monte Cristo. (Just watched it again.)
Jeremy Dumont, aka Jermande du Monfort, in my WIP.