'Winning' a fight is, most times, subjective.
For instance, Ultimate Thing knocked out the Zombie Hulk while visiting the Zombieverse. Weather or not that counts as a 'win' is debatable, and if 'it counts' is even more so.
The best direction I can give you is to check the characters' strength sections on their pages:
Then you can use these numbers to compare relative strengths, and get an idea as to who 'could' win. Keep in mind, whoever is writing the character has liberties to make them win fights however they want, within reason.