Well, these are just my oppinions, the Kryptonians have not done anything strengthwise that I would put past Hulk. They just had better fight scenes. This isnt a battle, just raw strength.
As far as Ultron and Thor, the scene lasted about 5 seconds and both the comments and the actions made show me that yeah, Ultron got the better of Thor when he ambushed him, then punched him and Thor made his comment but he didnt try very hard to force himself up. I dont know, I just didnt really get the impression that Ultron was much stronger than Thor, I mean, Thor never got to even hit him, if we assume Vision had Thor's power at that second, Thor could have easily knocked his ass away. Both the Kurse vs. Thor and Thor Ultron scuffle were probably the worst, unimaginative fight scenes in the Marvel Universe. Especially considering moments later him and Malekith were exchanging MOS level hits and destroying massive steel and concrete pillars ( which is better than those fragile skyscraper windows that Supes and Zod get jerked off over every ten seconds). Anyway, done ranting..
Whats 1 ton? Cap? Or that tier? Probably 1-2 I would say. In the comics, Yautja are closer to Spider-Man than cap and I could see a movie one probably maxing out between 1-2. GR is kind of iffy though. Cap definitely in that range.I always considered Cap and Preds to be about as strong as a Tiger, or Bear which would be more like superhuman and past what even a peak human should be able to do.