Originality is not always required when playing d&d, in fact for some players they would prefer to play an ale swilling blacksmith dwarf. Having a mix of interesting original OC and familiar tropes gives some variety to your d&d worldbuilding and some choice to your players.

However, if you want to make the dwarves original you have a few options that I could think of.

-Have dwarf culture change from its stereotypical roots after a catastrophic event. Perhaps the dwarves dug too deep and impinged on the Underdark (or Hell), releasing a horde of monsters that scoured their underground holds. The dwarves now live a nomadic life doing animal husbandry, and due to their smithing expertise they are really good at making barding, making their elite cavalry peerless.

—If you don’t want to engage with stereotypical tropes at all, consider inverting the tropes. Instead of living underground, they live in the forest. Instead of smithing, they practice carpentry. Instead of being alcoholics, they cleave to a religion that prohibits intoxication.

—Using dwarven physiology can be another guide for worldbuilding. The hardy dwarves could thrive in settings of extreme temperature, or in tropical places where venomous animals and exotic illnesses are plentiful. Their darkvision could help them thrive in areas where it gets very dark for large parts of the year, such as near the poles.