Tiamut vs 1.The one above all/Celestial 2.Exitar

Tiamut battles both separatly and all three are also celestials who will win?

Tiamut is the greatest Celestial. He made stars, sings a song that turns back time nearly 14 billion years, took on over a trillion Horde

Tiamut wins

TOAA only made a few appearances

Exitar>4th Celestial Host

TOAA will throw some planets at Tiamut, who will have to run for cover.

I honestly have no idea who will win between Tiamut and OAA, Exitar however I'm fairly certain will take care of Tiamut with no problem at all.

OAA: Not sure. I think Tiamut can take him but not easily.

Exitar: Tiamut looses.