They’d have to dig up and reanimate Joseph Cotten.
I’ve been told by at least three people that i look like Ewan McGregor. Last year one of my students wrote even on a teacher evaluation that i had “the most incredible resemblance to Obi Wan Kenobe,” and i don’t think the student had Alec Guinness in mind.
Persoanlly, i look in the mirror, and it’s not Ewan McGregor i see. Don’t get me wrong, i’d be quite happy to look like him. But i don’t.
But then again, i don’t think i look like any other famous actors either, so i guess i’d give McGregor the part. I like a lot of his work.
If we can’t get Welles, would you settle for some freeze-dried Raymond Burr?
Charlie Sheen.
How’re YOU doin’? 
And therein lies the problem.
I tell people that, and some people assume i must be pretty hot, but it just ain’t so.
Don’t get me wrong; i’m no John Merrick either. But i have a realistic sense of my own attractiveness, and Ewan McGregor i’m not.
John Goodman! 
35 pounds ago - Noah Wylie.
Now - Anthony Michael Hall (the current edition, not the one from ‘Weird Science’).
still, very tasty indeed
John Cussack - Playing a more sarcastic combination of Rob Gordon (High Fidelity) and Martin (Gross Point) Blank who occassionally drinks too much…
…which now that I think about it would make him Edward Burns.
Chuck Norris, with Charles Manson’s eyes and Sam Elliott’s voice.
If fantasy-based, Charlize Theron. If reality based, Kathy Bates.