Fisk is definitely Conquest

Matt sees himself as Pestilence- infecting everyone he touches

Karen sees herself as Death- Fruit withering on the vine as she approaches and such. Her (misplaced) guilt over Ben and Wesley still haunts her. She has nightmares of another attack in her dark apartment, a noose suddenly wrapping itself around her neck, of the reaper peering over her shoulder and picking out new victims from her friends