Clearly, very few people have shown the capability of being "worthy" to lift Mjolnir. However one question still arises.
According to Marvel wikia (here):
Mjolnir can also transform its user into his civilian guises. When Thor was a civilian, the hammer most often became an old wooden cane.
So, does the enchantment still hold when Mjolnir is disguised as
a cane (Comic-books) or as an umbrella (in the Thor:Ragnarok)?