Basically what the title says. I would say realistically it would be in no order
Superman / Batman / Spider-Man / Iron Man / Wonder Woman
No sure about wonder woman but these characters got the most out of there career's. Ask anyone about these characters & they know them nowadays. Honorable mentions are, Wolverine / Hulk / Thor / Captain America / Green Lantern / Flash / Spawn / & few others.
What about you?