I rate Link as power level 25, since he has the fully assembled Tri-Force.
I rate Invisible Girl as power level 24 (She can contain Torch's ability)
I rate Human Torch as power level 24. (He can theoretically fuse Earth's atmosphere).
I rate Silver Samurai as power level 22. Meta-Regeneration and Adamantium exoskeleton and adamantium swords.
I rate Hulk as an 8. "World Breaker Hulk" is a ridiculous outlier, and is ignored.
I rate Sabin as a 24, since he can move at light speed (Phantom Rush) and he can Suplex a Train, which Suplex is one of his weakest attacks. Phantom Rush is several times more powerful than Suplex and can't be blocked. He can also stop time and use all sorts of magic. He also has "Holy" Damage.
I rate Mr. Fantastic as a 24. Not only does his mutation give Superman fits, but he's smart enough to beat Superman with Kryptonite or some other type of radiation, and not subject to "Plot Induced Stupidity".
Name a character on this list or not on this list whom you think could stalemate or beat Superman.
I rate the Magnetic Mutant from Lois and Clark as a 20. He nearly killed Superman.
I rate Hercules (The Legendary Journeys) at max power is a 25.
Samson (Hebrew Bible) 24. He can't be 25 because he's sinner who failed God and lost his power because of it.