On the Wildstorm side, I’d say Midnighter is the bruiser, enforcer-type who hits first and asks questions second. He and Bogart would get along well.
Lex Luthor is the morally bankrupt public figure who smiles and tells the public one thing, while knowingly lying through his teeth and deceiving said public at the same time, with no care about who he has to crush under his heels to achieve his true goals. This fits several noir characters.
DeSaad is the sniveling, Peter Lorre-esque sycophant.
Cat Grant is akin to a Veronica Lake character. She’s a knockout dame who’d light-up the darkest soul, while having regrets she keeps to herself.
Superboy-Prime reminds me of Fred MacMurray’s character from Double Indemnity: both are supremely confident that their plans are free of any kind of flaw and will go as planned, when in reality their plans were flawed from the start and ultimately came crashing down around them, in part due to their own hubris.
Lastly, The Penguin (in his more modern guises) is the criminal who looks legitimate on the surface, and entertains the public with his swanky nightclub while being dirty as they come underneath, replete with all manner of criminal entanglements.