I'm going with Agamotto. It's been said that the realm of magic was "the realm of the vishanti", and Agamotto has mentioned directly his place in the multiverse in the past during his brief fight with Galactus.
From the wikipedia entry on Agamotto:
"Agamotto himself is called "the All-Seeing," and has apparently spent his long life observing events throughout the multiverse from the dimension in which he resides. He has been known to express partial apathy at any one universes' destruction as each is just one of the many universes that he likes to follow. Often this type of behaviour is part of an act he puts on: he has pretended to be indifferent or even hostile to Strange before just to teach or motivate him and the Vishanti feel responsible for the safety of every universe, but on at least one occasion the other Vishanti interfered, because they felt that Agamotto was being selfish. At other times, Agamotto chose to warn Strange, even though the other Vishanti felt that he had betrayed them."