I dont want a LOTR clone just everywhere I have looked wood elves are herbivores, friendy, there is no green pact, and they are usually good people not carnivores who eat everything they kill.
You seem to think being cannibals and being "good people" are mutually exclusive. Unusual practices do not necessarily mean that other cultures are "evil".
For a real-world example, take the Mayans. The Mayans believed in cyclical time, and that the world ended when the Gods grew week only to begin again in a new cycle. According to some Mesoamerican calendars, the world has gone through six of these cycles. The Mayans believed that, through spilling their own blood, they could empower the gods and postpone or prevent the end of the world. Bloodletting was a daily Mayan ritual, as normal as saying your prayers before bedtime.
Then, human sacrifices. According to some sources, human sacrifices were exalted beyond all others, because they were giving their lives to the gods. Voluntary sacrifice was apparently commonplace. The priests who cut the sacrifices' hearts out weren't murdering anyone - they were performing a religious rite that caused the sacrifice's soul to
ascend.
Similarly, cannibalism might be seen as a benevolent act amongst the Bosmer. However, to them it was a sacred rite.