I've noticed nods to Tron, Rubicon, Requiem for a Dream, Eyes Wide Shut, A Clockwork Orange, Network, American Psycho, V for Vendetta, and of course, Fight Club. There's been others for sure, but I haven't been able to put my finger on exactly what they were.

edit: Just read someone on Reddit saying BD Wong is pretty similar to Job from Banshee, and Sam Esmail himself said he's a fan, so there's that one, too.