The Celestials vs. The Beyonder

are these....the most powerful beings.... in the marvel universe ?

Isn't the beyonder just a single entity, and if we are considering him, that depends on whether he's classic or post-retcon.

Or maybe it's the true beyonders, i don't think they have ever appeared fully in 616

the classic beyonder did fight them and womped them........HAND TO HAND O.O it was sick fight he took them down in like 2 seconds

Kubik beat Beyonder and How his power compares to that of such beings as Galactus is unknown. However, Kubik may be less powerful than most known Celestials, and is definitely less powerful than the gigantic Celestial Exitar. Presumably Kubik is also less powerful than the true Beyonders, who created Kubik in the first place. Kubik is also definitely less powerful than Eternity, who is the sum total of the life forces of the entire universe, and certainly less powerful than the Living Tribunal, who serves as judge and executor of justice to the multiverse

Kubik later revealed that Beyonder's fight with the celestials was fake...and that he and the Beyonder are like insects to the Celestials... there are a lot of inconsistencies concerning the Celestials.

The Celestials are agents of the Beyonders. Beyonders are more powerful.