There could be a possible loophole if "evil" itself is not an extreme status, property, or measurement acknowledged by all developed population groups throughout time (i.e., only the majority of them). And "life" in biological context, of course, is devoted to what works or succeeds instead of morally wrong and right classifications. But let's ignore those to see where the other would go...
If any current ones don't suffice, then there surely has been in history or will be in the future a vegan credo somewhere that deems carnivorous activity by humans to be a vile practice. [Our evolving big brains -- the road to "human"-- is contended to have required rich protein sources for our distant ancestors in order to get such jump-started; thus unavoidable evil conflicting with an ethical formula like that.] Also pacifist-like sects which do not tolerate homicide under any circumstances, and who don't shy from branding it wickedness.
IOW, it's difficult to avoid "morally objectionable behavior" at some point if there is no universal standard for conduct that differing societies adhere to. Even if a person rigorously avoided ever venturing beyond the territory of their own tribe, then neighborhood subsets of mutable views allowed beneath the culture's overarching canon might still be encountered. Though the violations of them (personal or local offenses) might thereby not always carry enough legal or taboo weight to qualify for the magnitude of "evil".
However, "unavoidable" doesn't collapse without rival options into "necessary" (that which arguments can uphold as a priori or a bedrock principle or characteristic essential for the very operation, identity, or existence of _X_, or to keep out inconsistency). Especially if what's "unavoidable" is an emergent inescapability arising from contingent circumstances, yet of probabilistically ubiquitous scope in the rate of occurrence / applicability. (Hopelessly widespread in terms of social territory and interactions, at least -- but not with respect to this subject matter pertaining to the whole nonhuman world.)