Artaxerxes
Look out, he's got a gnu!
Proto oppressor?
Personally I think the interpretation is to tight. It’s a very rigid interpretation of the burial through the lens of how we interpret power. Alternative theories are possible and chiefdom is a sliding scale.
Each of those objects could have been placed by a community who respected and revered this man for a variety of reasons, chiefdom being just one of them. He didn’t place them there himself. The dynastic thing is also a reach, those burials are a couple of hundred years apart. The landscape was important and revered and barrows have been reused over the millennia before.
Given the time of discovery I’m also assuming we don’t have the bones or any trace of the man in the burial so… was it a man?