I haven’t watched any of Superboy or the serials yet and I watched one episode of Adventures of Superman a long time ago so I’m not comfortable ranking George so I’m only ranking the ones I know best.
Christopher Reeve (the best and I will never be convinced otherwise)
Tom Welling
Tyler Hoechiln
Dean Cain
Brandon Routh
Henry Cavill (would probably like him more if he had better material to work with)
I haven’t seen all of the Supermen, but from what I’ve seen:
Best Clark Kent: Christopher Reeve and Dean Cain (I can’t decide between them)
Hottest Superman: Henry Cavill
Best Superman: TBD. I wish I could say Henry but the movies really didn’t give him enough material to develop either Clark Kent or Superman as a character. He recited lines and did “super” things, but the lines didn’t reveal his personality. IMO.