The last two tracks off The Good, The Bad and The Ugly are some of the best Morricone options.
Nino Rota would be another great pick. I could list so many for both of those guys but I don't have the time to type them all right now. But the theme from Fortunella would be a great, if hella sacrastic, choice.
Gabriel Yared's "Crazy Tom" from The Talented Mr. Ripley is one of my favorites.
Certain portions of The Godfather, Part II would be very fitting.
If you want to go really bizarre, give Nico Fidenco's La Ragazzina a shot.
Back to Nino Rota, consider the Catwalk theme from 8½.
Oh my gosh, now I'm getting all excited. I'll leave for now before I get too obesssive.