goku would easily win any of these fights against ryu, because goku is an alien, and his skin cannot be pierced by mortal weapons (we saw gohan is super saiyan mode catch bullets) so in such at this point in the manga, goku can easily defeat him, however!
before the saiyans arrive, goku would be out matched by ryu as his skill wasnt fully developed, and the writers didnt know if he was going to be the main character or not in the series, thus ryu is regardless much, much, much smarter than goku in any way, but goku has speed, strength, and ki blasts that can destroy planets. ryu is outmatched
Broly vs Goku = Broly
Broly vs Goku + Gohan = Broly
Broly vs Goku + Gohan + Goten = SHOULD BE BROLY, but its the family
Broly was only defeated because goku relied on the powers from everyone to punch a gash in broly's chest, broly was then defeated by all of them, not even ssj2 gohan could defeat broly. as broly was too powerful, and fast.
here is a good match
Scorpion vs Ryu Hayabusa
i pull for ryu obviously, because scorpion is a demon/undead ninja, fights one on one, has speed and strength, and something others dont have... he is already dead, he has the power of the dead at his hands, can throw a spear from his hand, and spit fire, can sense movement before its made, and teleport at will.
however
ryu is a demon/human hybrid, as his blood is that of the fiends, he fights waves, upon waves of demons equal, or greater than him. His speed is far greater than that of a normal human, and his senses are so accute that he can sense the slightest muscle movement of someone as they are making it, and can predict where they will be, he is a martial arts master, and an expert in any weapon he handles, a tactile genius as well.
each of these figures have won a tournament
in the series it is said scorpion has won a tournament once, but i cannot find out where
ryu hayabusa won the 2nd tournament in DOA
i still put this in favor of ryu, as his battle skills are much more advanced than scorpion
