The stable of characters of Ace Magazines were

Ace McCoy

Agent Q-13

The Black Ace

Black Puma

Black Spider (Ace Magazines version)

Blitz Buster

Blue Rubber Man

Blue Spark

Buck Steele

Buckskin Blake

The Clown (Ace Magazines version, Dynamite) (Clown C.E.O.)

Captain Courageous (Ace Magazines, Dynamite)

Captain Gallant (Ace Magazines version)

Captain Nippo (Ace Magazines, Dynamite)

Captain Victory (Ace Magazines version)

Congo Jack

Copperheads

Corporal Flint

Cougar (Ace Magazines version)

Cross Draw Kid

Dictator's Shadow

Dr. Diablo

Dr. Nemesis (Ace Magazines, Marvel)

Doctor Oxyo

Eel (Ace Magazines version)

Fate (Ace Magazines version)

The Flag (Ace Magazines, Dynamite)

Flash Lightning

Gilda

Green Arrowhead

Green Genie

Hap Hazard

Icicle (Ace Magazines version)

Jewel

Lash Lightning and Lightning Girl (Ace Magazines, Dynamite)

Lenore Black

Lizard (Ace Magazines version-similar look to Marvel's Lizard)

Lone Warrior and Dickey

Maestro (Ace Magazines version)

Magno the Magnetic Man and Davey (Ace Magazines, Dynamite)

Marvo the Magician

Mastermind (Ace Magazines version)

Mirror Man (Ace Magazines version)

Moon Man (Ace Magazines, Moonstone)

Mr. Risk

Old Man of the Pyramids

Paul Revere, Jr.

Phoenix (Ace Magazines version)

Professor Aries, the Invisible Man

Professor Bixby

Professor Octopus

Purple Plague

Red Death

Retribution

Secret Agent X, the Man of 1,000 Faces

Shinto Samaraui

Surgeon

Teacher

The Cobra (Ace Magazines, Dynamite)

The Mummy

The Raven (Mr. Raven) (Ace Magazines, Dynamite)

The Swami

The Sword and Lancer (Ace Magazines, Dynamite)

The Torcher

The Unknown

The Unknown Soldier (The Soldier Unknown) (Ace Magazines, Dynamite)

The Vulture (Ace Magazines version)

Tiger Man (Ace Magazines version)

Uno

Vulcan (Ace Magazines version, Dynamite)

Whiz Wilson

X-2

X the Phantom Fed (Ace Magazines, Moonstone)