10 suggestions

Lucas Till
as Barry Allen in DC Final Countdown

Johnny Depp
as Joker in Batman Universe

Johnny Depp
as The Joker in Alternate DCEU
Giancarlo Esposito
as Lex Luthor in Alternate DCEU

Garrett Hedlund
as Aquaman in Alternate DCEU

Lucas Till
as The Flash in Alternate DCEU

Scott Eastwood
as Carter Hall in New DC Universe
Giancarlo Esposito
as Lex Luthor in New DC Universe

Hafþór Júlíus Björnsson
as Bane in DC Extended Universe Recasted

Amanda Seyfried
as Harley Quinn in DC Extended Universe Recasted