I highly doubt Thor would win against Goku, Hulk I could see having a good chance though. Yeah Superman Prime, how was he more like God's right hand man the only thing that could kill him is the end of reality.

You say that as though Hulk is more powerful than Thor. Thor has stood inside the sun without harm, beaten the Hulk down, held his own against Superman, and can wipe out a fifth of the universe with a God-Blast. He'd wipe out Goku like a boot over an ant.

Where do you read all these comics? Are there more characters as powerful as Thor in the Marvel world?

Most of my knowledge of comic characters comes from feats posted in vs threads and from reading about them on the Marvel wiki. And yes, there are plenty of people more powerful than Thor in the Marvelverse. I'd estimate he's on the lower end of high-tier, or upper high-tier if he has the Odinforce, though. The Void, the Celestials, Galactus and most of his Heralds, the Phoenix, whoever happens to be Captain Universe at the time, Thanos, and the Sentry are all quite capable of taking him on or defeating him. There's a few more than that, but I'm not in the mood to write all of them out.