Sorry mate, but any first year biology student learns that the higher up the food chain the more concentrated the heavy metals are. Take Tuna. As free range as you can get but it is advised to minimize consumption, particularly when pregnant, due to the high mercury content.

While lifestyle does affect palatability of the meat (Bear near the dump always tastes ‘off’) it is more a question of ‘what’ is being bioaccumulated, not ‘if’. In your example scavengers are bioaccumulating pesticides and preservatives, whereas the successful predator accumulates all the heavy metals its prey, and their prey, and their prey (repeat until the bottom of the tree) consumed.

You can’t get around it. All high level predators have shitty meat, whether it tastes bad or not.