I'll be the first person to vote for Gerard Christopher (Superboy, 1989-1992) - never heard of the guy, but going strictly on looks, he's got a slightly exotic look that synchs well with the idea that Supes is, after all, an alien. Dean Cain and Tom Welling also come close.
I think of Supes as looking clean-cut, not "all American" as a euphemism for Anglo. He's an alien!!!
I'd be fine with Superman having a more exotic appearance if we didn't have 70+ years of comics showing the contrary.
Comic characters are vague enough that we can all fill in the details we like. To me, Supes is an alien and he should look it, at least a little bit. Cain may look too exotic, Welling too little, so I went with Christopher.