HOTU is omnipotence in one Universe. Adam Warlock and Death where utterly unscathed because they where in another universe/outside the universe. Thanos beat the Living Tribunal and Eternity because they were in the Universe. Several scans and statements support that he had power over only the one universe. WIth that said about HOTU and with Liger Legis bigger than the multiverse, this ends with a stalemate between those two and Legis stomping everyone else.