Suggestions by @andymayer

Kevin Michael Richardson

as Bill Metzger in New Voice Actors to Play Marvel and DC Characters

PlainTalk

as The Living Brain in New Voice Actors to Play Marvel and DC Characters

Diedrich Bader

as The Gray Ghost in New Voice Actors to Play Marvel and DC Characters

Rino Romano

as The Gray Ghost in New Voice Actors to Play Marvel and DC Characters

Liam O'Brien

as Dr. Druid in New Voice Actors to Play Marvel and DC Characters

Rick Pasqualone

as Dr. Druid in New Voice Actors to Play Marvel and DC Characters

Jamie Chung

as Nico Minoru in New Voice Actors to Play Marvel and DC Characters

Judy Alice Lee

as Nico Minoru in New Voice Actors to Play Marvel and DC Characters

Carrie Keranen

as Whisper The Wolf in If this Sonic character was in Sonic X

Clancy Brown

as Deathstroke in New Voice Actors to Play Marvel and DC Characters

Jim Cummings

as Bowser in Casting a random character every Friday #1: Bowser

A.J. LoCascio

as Fantomex in New Voice Actors to Play Marvel and DC Characters

Shouko Komi

as Brighter - Hazbin Hotel in If this Character Were a Villain, Which Villain Song Would They Sing?

Brainiac (My Adventures with Superman)

as This is the Thanks I Get? – Wish in If this Character Were a Villain, Which Villain Song Would They Sing?

Michael Emerson

as Ultron in New Voice Actors to Play Marvel and DC Characters

Cherami Leigh

as Gwen Stacy (animation) in Casting a random character every Monday #1: Gwen Stacy (Ghost Spider)

John DiMaggio

as Thor (animation) in Casting a random character every saturday #43: Thor

Michael Emerson

as Mr. Sinister in New Voice Actors to Play Marvel and DC Characters

David Errigo Jr.

as Morph in New Voice Actors to Play Marvel and DC Characters

Eric Bauza

as Gizmo in New Voice Actors to Play Marvel and DC Characters