The Suit, a classic way to make a man (or woman) look smart and sophisticated, here's some of the great examples from the big screen, different eras classic statements.
Grant
Bale
Pacino
Washington
Gere
Douglas
DeNiro
Firth
Guniness
Hepburn
Dietrich
Clooney & Pitt
Pack
Dogs
...and not forgetting Dangerfield
Grey
Black
White
Silk