Suggestions by @ringothedrummer

Jim Carrey

as Dr. Dabney Donovan in Superman

Dave Bautista

as Darkseid in Superman

Cameron Britton

as Toyman in Superman

Martin Short

as Mister Mxyzptlk in Superman

Dominic Sessa

as Jimmy Olsen in Superman

Monica Barbaro

as Lois Lane in Superman

Sally Field

as Martha Kent in Superman

Stephen Root

as Jonathan Kent in Superman

Adam Driver

as General Zod in Superman

Guy Pearce

as Brainiac in Superman

Taron Egerton

as Lex Luthor in Superman

Jack O'Connell

as Lex Luthor in Superman

Bill Skarsgård

as Lex Luthor in Superman

Connor Swindells

as Superman in Superman

Wolfgang Novogratz

as Superman in Superman

Kyle Allen

as Superman in Superman

Clancy Brown

as Calvin Taylor in America Land: At Daggers Drawn

Adam Driver

as The Detective in America Land: At Daggers Drawn

Spoiler

as The Detective in America Land: At Daggers Drawn

Michael Palin

as Dr. Lint in America Land: At Daggers Drawn