I heard there was a couple panels in an issue of Avengers where some random paramedic handed Thor back his hammer in the aftermath of a super battle. By the time Thor realized "Hey, this random guy just picked up Mjolnir!" the paramedic had already disappeared into the crowd.
So taking that and JLA/Avengers into account, that random paramedic is more "worthy" than Superman. I really don't have a problem with that. Superman puts himself in harm's way knowing his powers will protect him. The paramedic doesn't have any powers to back him up, which makes him subjectively more heroic.