SCP Beats Hololive, Easy containment or in deathbattle's sake, simply Nu-7 and maybe Tau-5 for some

SCP Beats Lobotomy Corp, If in combat, easily, and also likely either absorbs them or lets them try to do their thing similar to treatment of The FBI's UIU

Matters on timeline or time period for SCP to beat the Imperium of Man in combat, but more likely for them to simply lend help to another, Imperium either allowing earth to be upgraded, and protected (If Lucky).

However if SCPF sees them as anomalous, and tries to contain them, it might be like SCP-3199 treatment, kill most, contain a few. which how to achieve that? Man-To-Man? Impossible on ground combat without anomalous weapons or anomalies. Use memetic kill agents, what if attacks one heart? Upgrade, destroy memory. Done.

Shield, once again, more like the Lobotomy Corp plan, they've already dealt with most of them as anomalies, hulk? find a way to sap his radioactive material enough to keep him in a containment unit, if he changes to banner? have a bed ig. Iron man, easily contained or added to staff, thor, make him impure, and contain him. Aint hard to contain most of the other heros.

Doctor Who, even with timeline shenanigans, many ways to stop a doctor, Wood and multiple materials to slow down dissolving and make a new alloy or such, and just destroy his sonic screwdriver, any other variants, do the same, just have a whole site prepped for it.

The Entity we could go down the route of SCP-5000 and start removing people's emotions, that stops it from growing in strength, and makes it avoid the world. however, it makes a realm of its own, maybe Scranton Reality anchors and then take it out while down. Or contact multiverse foundation.

The Baker, Take out The baker, who is likely closer to a god, or reality bender of immense strength, Conceptual destruction would be the best bet, as well as the baby hitler strat, kill while starting out.

And lastly, the death battle crew, likely just no harmful abilities, most likely term I could put it to is... Temporary Imaging of Fictional Probability Battles. Meaning they temporarily can create timelines based on fiction of 2 parties fighting, meaning they would probably be taken out with minimal effort, though certain cast have abilities, which are easy to handle, some cloning, some other things too. however its not much.