Bob Keeshen?

Would you describe that as sci fi?

Well, Jason went to hell and came back, which is supernatural, OP might call that Sci Fi. Michael Myers (Halloween) would also work, since there was one portrayal by a Canadian Actor (like Jason). Freddy Krueger was only played by Americans.

I will guess Jason Voorhees (Friday he 13th)

"Why didn't they replace Capt. Marvel with Wonderwoman when she already had a successful movie?"

Wonder Woman is DC Comics, not Marvel.

The 2017 Wonder Woman movie got good reviews and made a lot of money.

Is the main character a criminal?
If yes, I guess Saul Goodman

Did he work for the Justice Department?

If yes, I guess Elliot Richardson

I'll guess the other Liberal who died before 1940:
Is it Henry Campbell-Bannerman?

I have already guessed, but I keep having this Werner Herzog movie with Klaus Kinski come to mind about the search for El Dorado. Jesuit Priest to Native, holding up a bible: "God speaks to us through this book." Native, looking confused, puts the book up to his ear. Conquistadors scream "sacrilege!...

Was he Spanish?

If yes, I guess Hernán Cortés.

Was he a national leader (politics, military, royal)?

Did he win at least 5 Tony Awards?

If yes, I will guess Richard Rogers.

Was he known for his art (writing, performing, crafting)?