Every since Death Battle proved twice that Superman can beat Goku, there have been a lot of Dragon Ball Z fans, who are up in arms, about their favorite boy loosing. There are however, in my opinion, several characters who posses the capability to utterly destroy Goku. Without further adieu, here is a list of characters who could pound Goku to a pulp.
Goku is simply no match for the God Of Thunder. Thor is stronger, faster, more durable, and oh yeah, Goku has amazing fighting skill....Well Thor was waging war and honing his battle skills thousands of years, before Goku's birth. His hammer ( Mjolnir) is made of Uru, and is capable of harming almost anything, or anyone. His thunder magic is more than a match for Goku's chi/ki, and if we count Thor with Odin Force, he could destroy the entire DBZ universe, at once!
When the entity that gives John Blaze (Ghostrider) his power makes his presence felt, It is a truly sad day for his enemies. Zarathos is not only insanely powerful, but he can consume your soul, if need be. He is a godlike being, in his own right.
With or without the Infinity Gauntlet, Thanos is a force to be reckoned with! He takes on the Avengers, by himself, and commands phenomenal control over cosmic energy, and his ability to absorb it, makes Goku's chi/ki a non-factor. Goku is a god, well guess what predated the gods....Titans. When Thanos makes trouble, it is on a universal scale, and makes even the most powerful heroes nervous.
#4 Silver Surfer
A frequently asked question is, "how can anyone fight Goku, when he is so fast?' Well, Silver Surfer possesses the Power Cosmic, making him able to absorb any kind of energy, including chi/ki, so he could render Goku powerless, if he felt like it, and using the Power Cosmic, he can literally make himself as fast, strong, durable, etc, as he wants to be. Goku can break the light barrier? Cute trick bro. Silver Surfer can break the time barrier, control matter at a sub atomic level, shoot bolts of cosmic energy that can break stars, has telepathy that is stronger than Professor X's (which he proved when he took a blast from the mind gem, and brushed it off), can fly through the heart of the sun, and black holes, his skin is harder than vibranium, he has cosmic awareness, and regularly does battle with gods and titans. He could BFR Goku, with a stray thought.
Darkseid Is truly awesome! He can control and manipulate any kind of energy, which again makes chi/ki useless against him, He is stronger, faster, and more durable than Superman. In "The Great Darkness Saga," Darkseid displayed a range of awesome deity-like powers, such as transposing the positions of two planets in different solar systems, taking mental control of the entire population of a planet, and instantly absorbing all the information from another being's mind, manifesting the worst fears of other beings as realities. He can teleport throught time and space, has wicked control over telepathy and telekinesis, and is essentially immortal, having lived for thousands of years. Oh yeah...Then there is something called the The Omega Factor, which not only eradicates his enemies, but wipes them from existence! He also has legions of parademons and is one of the most intelligent beings in the universe. Darkseid is more than a match for Goku, or the whole DBZ universe, for that matter!
There you have it! Don't agree? I don't care! Goku is powerful, but against these characters, he is little more than an annoyance! All of these characters have the skill set to put Goku down, quick. I know there will be some butthurt DBZ fanboys, who beg to differ, but oh well. I like DBZ as much as the next guy. I have read the comics, and watched all the cartoons, but Goku is just not as powerful as DBZ fans would like to think he is.