Without Mjolnir, Thor might actually lose against Shazam as it's where a lot of Thor's magical abilities come from. Shazam doesn't need such a token to use magic and can easily amp up his strength, speed, and even durability to match or even surpass Thor's.
On their own, both these noble heroes are capable of beating incredible forces. But for all Shazam's power, he does not match Thor's experience in using the more arcane elements of his abilities.
In the MCU, DCEU Shazam is no match for Thor. If you mean comics Thor vs Shazam, then it's a closer fight to deal with, but Thor is still stronger. Thor can win by controlling Shazam's lightning and redirecting it to turn him back into Billy Batson.
Captain Marvel, aka Shazam, is one of the most powerful heroes DC has to offer. He's on Superman's level, though Shazam's powers are derived from magic. However, being powerful is not what makes Shazam worthy of Mjolnir. In fact, Shazam is not the one who is worthy of the hammer; Billy Batson is.
Shazam would put up a good fight for a bit, but Thor would be able to overpower him and take him out. Even without his enhanced abilities, Thor's ability to command the lightning with Mjolnir could even disrupt Billy Batson's transformation into Shazam.
No. Thor's hammer is extremely durable. We've seen Superman hit with things before that didn't break. The only way I see a fight with Thor & Superman ending with Mjolnir broken is if Superman punched it as hard as he could while Thor was swinging it as hard as he could.
By most accounts, Superman seemingly outclasses Thor in terms of raw strength, especially in earlier versions of the DC Universe. He's pulled planets, punched people into orbit, and performed all sorts of wild feats of strength.
Thanos is one of Marvel's greatest villains but that doesn't mean he's dangerous to the most powerful DC heroes like Shazam. Heroes like Shazam and Superman can lift tens of thousands of tons; Thanos tops out at much less than that.
Even the regular Superman would probably be enough to defeat Thor. It would be a close match since Superman isn't as durable against magic but Thor would definitely struggle against Superman's might, more so if he's bloodlusted.
Ultimately, pure strength and speed will win the fight of pantheons, with the gods-given power of Black Adam simply being too much for Thor. Black Adam has speed on the level of a Kryptonian or even the DCU's version of The Flash, which is simply too much for Asgard's former prince.
The Olympian and the Asgardian are evenly matched in terms of both strength and durability. For comparison, both Thor and Hercules' durability and raw power pale in comparison to the likes of Zeus - a low-key but crucial Thor: Love and Thunder spoiler for any future outings of the Olympians.
Steve Rogers is one of the few mortals able to not only lift Mjolnir, but wield its full power, making him someone who legitimately could defeat Thor. Assuming the reason for their battle is due to Thor being deceived, possessed, or otherwise out of his mind, Cap would be able to use Mjolnir against him.
You've got to also have a keen fighting style, and we're pretty sure that one goes to Thor. Obviously, Aquaman has seen his share of battle, and there are a bunch of dead parademons who can attest to his skill. But Thor has proven repeatedly that he can always come out on top in a contest of pure fighting skill.
Not only does it make Thor even more dangerous in battle, it allows the Thunder God to fly, conjure up storms, and even control lightning. As it turns out, this later power applies to the magic lightning wielded by other heroes, including DC's magical champion Shazam!
Zeus would have the home turf advantage in this fight, as he rarely leaves Olympus. However, he's also just not used to fighting like Thor is. Zeus is certainly more powerful than Thor in many ways, but he's not a fighter like Thor is.
Even though Captain America has his shield combined with the Mjolnir, no matter how hard he tried, chances are he would largely lose against Thor. Thor is, again, the God of thunder, so his powers are basically unmatchable.
Superman could wield Mjolnir because he is, at his core, one of the purest heroes in the DC universe. In fact, Superman has wielded Thor's hammer before. In Avengers/JLA #4, a crossover limited series from 2004, Superman was able to lift Mjolnir in a battle with Kronos.
Even though Superman is often considered the most powerful character in the DC Universe, Shazam definitely comes close, and he can even beat the Man of Steel. And with a massive power upgrade, there's no question that Shazam can meet Superman blow for blow—despite the upgrade's terrible side effects.
The problem with Shazam fighting Darkseid is that even though his powers make him smarter, Billy still makes mistakes. Darkseid is known for capitalizing on his foes' weaknesses and if he gets his hands on Shazam, he might be able to invade the Rock of Eternity and steal its power.
Iron Man is one of Marvel's biggest icons. Despite this, Shazam would undoubtedly beat Iron Man in a fight. There's not a lot that Iron Man could do in his base suit to hurt Shazam. Iron Man likely wouldn't be able to think of a way to beat Shazam, as magic is outside of his wheelhouse.
He has centuries of battle experience, the hones skills of a warrior, and one of the most powerful weapons in the universe. Putting it all together, Thor can win against the Hulk, even if he can't kill the Jade Giant.
Goku is probably stronger than Thor at full power, but that's debatable. Both of them have amazing energy powers at similar levels, but the Thorforce is a more powerful source of power than Goku's Saiyan genes. Mjolnir is an amazing weapon and Thor is a master of it, giving Thor more combat options than Goku.
