1. Kurse (amped fourth times by the Beyonder)
2. Dark Sentry (Siege Sentry)
3. Mangog (classic version)
4. Gorr (with the All-Black)
5. Thanos
6. Tyrant (depowered)
I think he gets to Thanos, but every one of these characters could be argued to break even with him. Even Mangog has a universal strength feat by biting chunks out of Ultimate Mjolnir which survived the destruction of it's native reality. Just saying.
Stops at 2. Tentacle mode Sentry is tailor made to beat Superboy-Prime, who is a mentally fragile mental midget. One tentacle and you'd have him lying on the ground, curled up in the fetus position and crying for Laurie.
There are more than enough Marvel heroes who can drop SBP. It's really not hard. He's only tough in DC cuz 90 percent of hero skill sets are fAsT and pUnChEs rEaL hArD. Marvel skill creativity spanks him soundly. Any mid level psionic convinces him he's a potted plant.
Bad logic. Objects and character's have variable durability and levels from scene to scene. So abc logic becomes flawed when equating a highest showing with all other showings.
Show scans of Mjolnir tanking a universal destruction attack.
Kurse can't even lift a single Earth weight. Prime can exert more than millions of times more than an Earth weight. So how is Kurse trouble?
Sentry is similar. Prove that Sentry is at least 1/1000th as strong as Prime. Give his best strength feat. And I'll give you a feat guaranteed to be more than a million times greater.