I agree with guy here. I would give Superman the majority over any herald of Galactus besides Surfer, StarDust, and Firelord. I think Firelord is the special mixture of ass whippin for someone with Supes powers.
By the way psycho, you have to look at it like this, Supes heat vision could also power firelord up. Superman only attack that he can use against firelord is his fist whereas firelord can use all of his powers including his physical stats.
Thats is where this come into play (the majority). Then Firelord can also use that nice power of his to encircle himself with cosmic energy also making it difficult for Supes to touch him.
Then to top it off, we have Surfer, a guy who absorbed an entire sun complaining about firelords heat, saying that he couldnt take it.
I still thiink this is a good fight but I'm giving it to firelord 7/10, versatility and power is on his side.