Suggestions by @gregray
190 suggestions

Jim Shield
as Sylvester Pemberton (Earth-167) in Worlds of DC

David Gallagher
as Zan (Earth-167) in Worlds of DC
Allison Scagliotti-Smith
as Jayna (Earth-167) in Worlds of DC

Elise Gatien
as Mia Dearden (Earth-167) in Worlds of DC

Sharon Taylor
as Faora (Earth-167) in Worlds of DC

Ned Beatty
as Otis (Earth-96) in Worlds of DC
Parker Posey
as Kitty Kowalski (Earth-96) in Worlds of DC
Valerie Perrine
as Eve Teschmacher (Earth-96) in Worlds of DC

Glenn Ford
as Jonathan Kent (Earth-96) in Worlds of DC

Peyton List
as Lucy Lane (Earth-167) in Worlds of DC
Michael Ironside
as Sam Lane (Earth-167) in Worlds of DC
Margot Kidder
as Bridgette Crosby (Earth-167) in Worlds of DC
Gary Hudson
as Frank Loder (Earth-167) in Worlds of DC
Ian Reed Kesler
as Chris Cassius (Earth-203) in Worlds of DC

Donovan Leitch
as Malcolm Lagg (Earth-203) in Worlds of DC

Kristoffer Polaha
as John (Earth-203) in Worlds of DC

Sung-Hi Lee
as Sandra Wu-San (Earth-203) in Worlds of DC
Rob Benedict
as Gibson Kafka (Earth-203) in Worlds of DC

Lori Loughlin
as Carolyn Lance (Earth-203) in Worlds of DC

Mitch Pileggi
as Al Hawke (Earth-203) in Worlds of DC