Suggestions by @vincentwilliamsiii

Wonder Woman

as Diana Prince in Task Force X I

Superman

as Kal-El/Clark Kent in Task Force X I

Black Canary (Dinah Lance)

as Dinah Laurel Drake in Task Force X I

John Lynch (DC)

as John Lynch in Task Force X I

Grifter

as Cole Cash in Task Force X I

Amanda Waller

as Amanda Waller in Task Force X I

Deathstroke (Slade Wilson)

as Slade Wilson in Task Force X I

Steve Trevor

as Steve Trevor in Task Force X I

Steve Trevor

as Steve Trevor in Wonder Woman II

Reign (Supergirl)

as Reign in Supergirl I

General Dru-Zod

as Dru-Zod in Supergirl I

Superboy

as Subject 13 in Supergirl I

Silver Banshee (Siobhan Smythe)

as Siobhan Smythe in Supergirl I

Alura In-Ze

as Alura In-Ze in Supergirl I

Zor-El

as Zor-El in Supergirl I

Supergirl (Kara Zor-El)

as Kara Zor-El/Kara Danvers in Supergirl I

Superman

as Kal-El/Clark Kent in Supergirl I

Ganthet

as Ganthet in Lantern Corps Series S2

Mongul

as Mongul in Lantern Corps Series S2

Kilowog

as Kilowog in Lantern Corps Series S2