If you were to put every animal together, including man (without all his tools and weapons) which animal would come out on top in a fight and be the strongest?

Did you mean, "The strongest animal'?

Dominance, when referring to animals, is associated with hierarchy, social structure, and "ranks" (e.g. wolves, lions, meerkats, etc.)

The word "strongest" can be really confusing, especially when talking about fighting. Certain skills need to be acquired (such as agility, speed, tactics, etc.). For example, an African elephant could easy crush a tigers bones but since it is not very agile, the tiger could take it down first.

But to answer your question, it would definitely not be man. The strongest, largest, and heaviest animal is the blue whale. The strongest land animal is the Elephant (African Bush Elephant, not Asian). After elephants, it would be something near polar bears and Siberian tigers.

That's easy. It would still be Mr. Rogers in a blood-stained sweater.