I don’t know of a commonly agreed-upon term for that, unfortunately. “Utility maximizer”, “VNM-rational agent”, and “homo economicus” are similar to what you’re looking for, but none of these terms imply that the agent’s utility function is necessarily dependent on the welfare of others.
I don’t know of a commonly agreed-upon term for that, unfortunately. “Utility maximizer”, “VNM-rational agent”, and “homo economicus” are similar to what you’re looking for, but none of these terms imply that the agent’s utility function is necessarily dependent on the welfare of others.