Mjölnir is most recognised and well-known weapon. Ofc it is the best.

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In term of general weapon design I would say Stormbreaker because it is both hammer and axe and having an axe has major advantages however I went with Mjolnir because it has a cosmic storm stored within it that originally made it heavy for Odin to wield until he enchanted it and what not.

I particularly like Jarbjörn because it can cut through celestial armor and many other things(duh) and still gives Thor better control of his weather powers plus he looks badass with it

Thor killed the Celestial Exitar with Jarnbjörn so I guess it's his best weapon....

Mjölnir is the best design wise.

Stormbreaker is da best cuz it is universal

Axe is worst cuz I say so, that's the bottom line

Not sure now, yikesss