+1
(though Police #12 cover is probably Gill Fox)
In terms of "Favorite Golden Age Character", for me it comes down to the characterization of the character. Which means ya gotta read the stories. I think the detective-based comics (e.g., Batman, Sandman) rate well, given the classic trope of a mystery followed by a satisfying reveal. I like that stuff. But I would echo the other comments above about Jack Cole. His Plastic Man is really astounding. It is ironic that many of the Plastic Man covers are a bit meh (which especially these days will put off the cover-centric collector), but the stories and art really shine, at the outer limits of the surreal.
And let's not forget Stardust and Fantomah from the insane Fletcher Hanks. Those stories are so over the top bizarre.
My honorable mention would include: EC comics. Though not a character, EC had a monopoly on great stories and art of all themes (sci-fi, horror, crime). And Marston's Wonder Woman; how BDSM ever thrived in the early 40's comic books is puzzling to say the least!