Humans are still at the top of the food chain, As a bear, the hunter will become the hunted.
Humans are on top of their food chain, e.g. phytoplankton -> zooplankton -> mackerel -> tuna -> human, bears are on the top of theirs (same as before but tuna -> bear). On a food chain involving both species, bear would be above since humans don't eat bears.
Fun fact: humans are nothing but a liability for nature as they provide little to no advantages and it could self-regulate without them just fine.