Let's be clear: General Thaddeus “Thunderbolt” Ross—AKA Red Hulk—is not worthy of Thor's powers nor has he actually lifted the hammer under normal circumstances.
No, because it's not a matter of strength. One can only lift Mjolnir if he is worthy or can somehow bypass the enchantment put on it neither of which Hulk is capable of.
Thor fought the Red Hulk to a stand-still, and just as he was about to deliver the final blow, Hulk snatched victory from Thor's grasp. Hulk needed to win this battle, and A-Bomb convinced Thor of this as well.
Other than Thor and Odin, certain other individuals have proven worthy of lifting Mjolnir in the primary continuity: Roger "Red" Norvell (a deliberate ruse by Odin) Beta Ray Bill. Buri (also known as Tiwaz, Thor's great-grandfather)
And not only that, their mission is noble enough that it's earned the loyalty of Mjolnir. While it is still Thor's hammer, it won't hurt one of the Panther Kings. It's even revealed that in the past, the first Black Panther actually once wielded the hammer himself, using it in unseen battle to protect the world.
After bashing Thor with an entire stone pillar, Juggernaut managed to separate Thor from his hammer – but was unable to lift it as a selfish brute like him was unworthy of its power.
In the end, Deadpool wasn't worthy. While he seemingly had control of Mjolnir and the strength of Thor, it was all a mirage put on by Loki to distract Thor.
While Batman does have some of the characteristics that would allow him to lift Mjolnir, he also has committed several acts that disqualify him. This is a man who once kept extensive files on his allies in case he needed to take them down, files that were stolen and used against said allies.
Loki is confirmed to be worthy of lifting Thor's hammer, Mjolnir, for the first time in official Marvel canon. In The Immortal Thor #5, Loki confidently catches and wields the hammer, showcasing his growth and heroism.
Unlike the green Hulk, who gets stronger as his rage increases, Red Hulk's body temperature rises with his anger. Though the heat is intense enough to melt desert sand into glass, it causes him to weaken when it becomes too intense, as his physiology lacks a cooling mechanism to deal with the excess heat.
Thanos and Hulk have clashed several times in Marvel lore, with Thanos even admitting he was scared to face the Hulk before acquiring the Infinity Stones. While Thanos is usually the victor, it's generally down to him using superior tactics and technology, rather than simply possessing greater physical strength.
Superman would win. In the end, Red Hulk has limits to how much energy he can absorb as seen when Hulk was able to take advantage of Red Hulk's ability to get hotter the madder he gets. In comparison, Superman has shown no limit to how much energy he can absorb. Also Superman has a huge speed advantage over Red Hulk.
He can't. Some proof from one of the Avengers movies: However, if you're asking if Hulk will be able to lift Thor's hammer in the future, then I don't know the answer to that.
A machine can pick up the weapon and move it anywhere since it's mindless and incapable of possessing the morals necessary to be considered worthy. By this logic, Ultron himself could have lifted it, but it wouldn't have done him much good.
While Superman could potentially overpower Thor, blows rendered by the mystical Mjolnir would likely impose serious damage on the Kryptonian hero. With his super-speed, the Man of Steel could probably avoid the Thunder God's lightning, but not necessarily, since Thor is just as fast.
Others believe Thanos lifted Mjolnir (although briefly) and have even argued that he would be worthy of doing so. So, can Thanos lift Mjolnir? In reality, Thanos didn't even try to take the hammer because he knew he wasn't worthy of it.
Although Kratos never gets to wield the hammer, given his own extraordinary godly strength that slightly surpassed even that of Thor and even being able to hold Mjolnir back with his bare hands when Thor threw it at him, it's very likely that Kratos would be fully capable of using the hammer if he wanted to.
If fans wait to see Peter Parker lift and use it in MCU, they may be disappointed. Despite his strong moral sensibility and strength of character, Peter lacks the ruthlessness that destroys all evil. For this slight defect in character, Mjolnir will never find this Spider-Man worthy of it.
Rather than simply being righteous warriors, Mjolnir's wielders need to be on the front lines of huge threats to the Ten Realms. This explains why in Age of Ultron, the MCU's Cap could only shift Mjolnir slightly –he was not yet the "tip of the spear." Later, facing off against Thanos elevated him to full worthiness.
Unlike the others, Zeus is not worthy to lift Mjolnir, but through a loophole, he can anyway. If Mjolnir is to enter his domain, Zeus's MCU powers should override Odin's enchantment, meaning he can hold Mjolnir. He may not be worthy, but technically Zeus is the fifth character who can lift Mjolnir in the MCU's Phase 4.
Unlike Mjølnir, however, the weapon is not enchanted to prevent those deemed "unworthy" from holding it, making anybody with sufficient strength capable of using the weapon.
While no one besides Thor has been able to truly wield the awesome might of Stormbreaker, Groot was the very first being to hold this weapon when one of his arms became the handle for the mighty axe.
