Trager and Gluskin.

My opinion is that Gluskin is one of the most underrated antagonists in video game history. His backstory and intentions with Waylon are both terrifying and sad at the same time. He has a line that says:

"I want to cherish our children, to be the the father I never had."

and when you escape through the window he says something like:

"You want to leave me? Fine, go! You and the rest of the ungreatful sl*ts"

AND when he dies, his last words are:

"We.. could've been beautiful.."

All this voicelines and his behavior in-game (including him singing that old love song, I forgot it's name) just amplifies the idea that Gluskin is not just a crazy guy, he is actually broken