Jerry Siegel as Superman?

First, a note to regular readers: I apologize for posting so infrequently since early July. I moved several states away and it's taking longer than anticipated to get organized...plus I'm preparing something big that will hopefully make up for these silent weeks.

In the meantime...

I came across a surprising message board post in a thread about the casting of actors as superheroes for movies. To be specific, the thread asks if it's still possible to cast an actor who does not resemble the comic book character he is playing, as this particular poster says Tim Burton did when choosing Michael Keaton for Bruce Wayne in 1989.

The poster goes on to speculate about the possibility of casting an "ordinary" looking person as Superman...perhaps a person who looks like...

What if someone had taken the character idea of Clark from the novel It's Superman! [by Tom De Haven] and we would've had a Superman who was an average guy (let's say like Jerry Siegel, his creator, kinda like his appearance in Boys of Steel)?

(This statement has been lightly edited for punctuation. Sorry, I can't restrain myself.)

An interesting if unlikely thought. And I was blown away by the casual mention of Boys of Steel: The Creators of Superman, as if any reader would know it without elaboration! I know this is not the case, but like Jerry Siegel, I am allowing myself to dream. Thanks anonymous speculator!