Patton Oswalt as Matthew the Raven Oswalt has built his career on memorable character roles, and voicing Dream's trusted emissary will definitely continue that tradition! This won't be his first major voice role, either: he's the voice of Remy in Ratatouille and voices the villain M.O.D.O.K. on the Hulu series of the same name, along with his lengthy live-action resume that currently includes Peacock's AP Bio. Image Source: Getty / Frazer Harrison